Hayward Vs Pentair Salt Chlorine Generator: Which Is Better?

Hayward’s primary SCG product line is the AquaRite salt chlorine generator, which has been the best-selling residential saltwater chlorinator in North America for over a decade. Pentair’s primary SCG line is the IntelliChlor salt chlorine generator, which integrates tightly with Pentair’s IntelliTouch and EasyTouch automation controllers.

Both systems require pool water to contain sodium chloride at 2,700 to 3,400 ppm, which is roughly one-tenth the salinity of ocean water. At that concentration, you cannot taste the salt and it causes no corrosion to standard pool surfaces, though it does require compatible stainless steel or titanium pool equipment.

Hayward AquaRite vs Pentair IntelliChlor: Model Lineup and Pool Size Coverage

Hayward and Pentair both offer multiple SCG models sized by the maximum pool volume each unit can sanitize at standard usage. Matching your generator’s rated pool volume to your actual pool size is the single most important selection criterion, as an undersized unit runs at 100% output continuously, which dramatically shortens salt cell lifespan.

Hayward AquaRite Models

The AquaRite line includes four main models differentiated by rated pool capacity and cell size. All four use the same T-Cell format with titanium plates coated in a ruthenium-iridium oxide catalyst layer.

• AquaRite with T-3 Cell: rated for pools up to 15,000 gallons, produces up to 0.53 lbs of chlorine per day
• AquaRite with T-9 Cell: rated for pools up to 25,000 gallons, produces up to 0.98 lbs of chlorine per day
• AquaRite with T-15 Cell: rated for pools up to 40,000 gallons, produces up to 1.47 lbs of chlorine per day
• AquaRite with T-15 Pro Cell: rated for pools up to 40,000 gallons with an extended electrode surface area for longer cell life

Hayward also offers the AquaRite Pro and AquaRite XL series, which add features like Wi-Fi connectivity, expanded diagnostics, and compatibility with the Hayward OmniLogic and ProLogic automation systems.

Pentair IntelliChlor Models

The IntelliChlor line also includes four main models, all using titanium plates but with a different electrode geometry and a reverse-polarity self-cleaning cycle that operates on a fixed time interval rather than on-demand.

• IntelliChlor IC15: rated for pools up to 15,000 gallons, produces up to 0.53 lbs of chlorine per day
• IntelliChlor IC20: rated for pools up to 20,000 gallons, produces up to 0.70 lbs of chlorine per day
• IntelliChlor IC40: rated for pools up to 40,000 gallons, produces up to 1.40 lbs of chlorine per day
• IntelliChlor IC60: rated for pools up to 60,000 gallons, produces up to 2.10 lbs of chlorine per day

The IC20 tier that sits between 15,000 and 40,000 gallons gives Pentair an advantage for pools in the 20,000 to 25,000-gallon range, where a Hayward owner must either undersize with the T-9 or oversize with the T-15. The IC60 also addresses large commercial-residential pools that Hayward’s residential AquaRite line does not cover.

The table below provides a side-by-side model comparison across the specifications that matter most for initial selection.

Flow Rate Requirements: The Critical Difference Most Buyers Miss

Pentair IntelliChlor cells require a minimum flow rate of 50 GPM to operate, while Hayward AquaRite T-cells require only 20 GPM. This single specification eliminates the IntelliChlor as an option for pools running variable speed pumps at low speeds during off-peak hours, a setup that has become standard practice since the EPA’s WaterSense guidelines promoted variable speed pump adoption.

A variable speed pump running at its lowest filtration speed of 1,200 to 1,500 RPM typically produces 20 to 35 GPM on a standard residential pool plumbing setup. That is below the 50 GPM threshold the IntelliChlor requires, which means the cell stops producing chlorine and may display a flow fault during low-speed filtration cycles.

Hayward’s 20 GPM minimum means the AquaRite continues generating chlorine even at low pump speeds, giving pools with variable speed pumps more daily chlorine production hours. For a pool running its pump 12 hours per day with 8 of those hours at low speed (producing 25 GPM), the Hayward cell will generate chlorine for the full 12 hours while the Pentair cell may only generate chlorine for the 4 hours when flow exceeds 50 GPM.

This flow rate difference is not a defect in the Pentair system. It reflects a different design philosophy: Pentair’s IntelliChlor is engineered to work as part of an integrated Pentair ecosystem where the automation controller manages pump speed in coordination with the SCG’s flow requirements. If your pool runs a Pentair variable speed pump paired with a Pentair automation system, the controller can be programmed to increase pump speed whenever the SCG needs to produce chlorine, eliminating the flow limitation problem entirely.

Self-Cleaning Mechanisms: Hayward Adaptive vs Pentair Timed Reverse Polarity

Both the AquaRite and IntelliChlor use reverse-polarity self-cleaning, which periodically reverses the electrical charge on the titanium electrode plates to release calcium carbonate scale deposits before they accumulate. The difference lies in how each system triggers that reversal: Hayward uses an adaptive algorithm while Pentair uses a fixed time interval.

Hayward’s AquaRite monitors the cell’s operating voltage and triggers a polarity reversal when it detects the cell is working harder than normal, which is typically caused by scale buildup increasing electrical resistance. This adaptive approach means the cleaning cycle activates when scaling actually occurs rather than on a schedule regardless of conditions, which Hayward claims extends electrode life by avoiding unnecessary polarity reversals in clean-running water.

Pentair’s IntelliChlor triggers its polarity reversal on a fixed timer, typically every 3 to 5 hours of operation depending on the model. This predictable schedule makes the IntelliChlor’s cleaning behavior easy to diagnose and verify, though it means the cell reverses polarity even in water conditions where no scaling is occurring. In pools with calcium hardness consistently below 200 ppm and cyanuric acid maintained at 60 to 80 ppm, the fixed-schedule approach may result in slightly more polarity reversals than strictly necessary.

In practice, the cleaning mechanism difference is minor for most residential pools. Both systems require periodic manual inspection and acid washing of the cell every 3 to 6 months in areas with hard water (calcium hardness above 400 ppm). A cell cleaning stand and diluted muriatic acid solution (1 part acid to 10 parts water) is the standard method for removing calcium deposits that the self-cleaning cycle cannot handle.

Automation Integration: Which Brand Plays Better With Your System?

Automation compatibility is the most decisive factor when choosing between Hayward and Pentair if you plan to control your pool equipment from a smartphone or want your pump, heater, lights, and SCG to communicate with each other. Both brands have closed ecosystems that work best with their own components, and mixing brands across major equipment categories introduces communication limitations.

Hayward Automation Compatibility

The AquaRite integrates natively with the Hayward OmniLogic and ProLogic automation controllers. OmniLogic, Hayward’s current flagship automation platform, provides real-time salt cell status, production percentage control, and diagnostics directly through the OmniLogic app, which works via Wi-Fi without a separate hub or subscription fee. The AquaRite Pro series adds built-in Wi-Fi so the SCG can connect to the app independently even without a full automation controller, which is useful for pools that want smartphone monitoring without investing in a complete automation system.

Hayward’s OmniLogic platform also integrates with Amazon Alexa and Google Home, allows multi-equipment scheduling, and includes a built-in ORP sensor input for pools that want to monitor oxidation-reduction potential (ORP) as a secondary chlorine demand indicator.

Pentair Automation Compatibility

The IntelliChlor integrates natively with Pentair’s IntelliTouch and EasyTouch automation systems and communicates via the Pentair RS-485 data bus, a serial communication standard that allows multiple Pentair devices to share one communication cable. The IntelliConnect wireless controller adds smartphone access to EasyTouch systems, and the Pentair ScreenLogic2 Interface provides full automation control via the ScreenLogic2 app for IntelliTouch systems. Pentair’s automation ecosystem is older and more mature than Hayward’s OmniLogic platform and is widely used in commercial aquatic facilities in addition to residential pools.

One important practical note: Pentair’s IntelliChlor does not have a standalone Wi-Fi option equivalent to the AquaRite Pro. Without a Pentair automation controller, the IntelliChlor is controlled only via its local control panel. This matters for pool owners who want smartphone access to their SCG without purchasing a full automation system costing $1,500 to $3,000 installed.

Third-Party Automation Compatibility

If your pool already uses a third-party automation system such as Jandy’s iAqualink or a generic controller, neither the AquaRite nor the IntelliChlor will integrate natively. Both SCGs can still be connected to third-party systems via dry contact relay control, which allows basic on/off switching but does not pass diagnostic data like salt level, cell voltage, or production percentage to the third-party controller.

Price Comparison: Upfront Cost and Total Cost of Ownership

The upfront purchase price difference between comparable Hayward and Pentair models is small, typically $50 to $150, but the total cost of ownership over 10 years depends primarily on how long the replacement salt cell lasts and what the replacement cell costs at that time. Cell lifespan is the dominant cost variable in any SCG’s 10-year economics.

The chart below shows real-market price ranges for current primary residential models, organized from lowest to highest retail price.

10-Year Total Cost of Ownership Comparison

The table below models total cost over 10 years for a 40,000-gallon pool using the T-15 and IC40, assuming two cell replacements over the period (at years 4 and 8 under proper water chemistry management), plus annual pool salt costs of $80 to $120 per year for a pool that starts with correct salinity and only needs top-off additions.

If you are thinking through the full economics of switching to a salt system, comparing long-term running costs between saltwater and traditional chlorine pools gives you the complete financial picture before you commit to either brand.

Diagnostics and Troubleshooting: Which System Is Easier to Maintain?

Hayward’s AquaRite provides more granular diagnostic data to the user than the Pentair IntelliChlor without requiring an automation controller. The AquaRite’s control panel displays instant salt level, cell voltage, and production percentage simultaneously, and the AquaRite Pro adds these readings to the OmniLogic app with historical trending. This transparency makes it easier to identify problems early, such as rising cell voltage indicating scale buildup or dropping salt level indicating water dilution from rainfall.

The IntelliChlor’s local control panel displays salt level and status indicators but provides less numerical diagnostic detail than the AquaRite panel in standalone mode. Full diagnostic data from the IntelliChlor, including cell voltage and operating hours, requires connection to a Pentair automation controller. For pool owners who rely on visual panel inspection rather than an automation app, the AquaRite’s standalone diagnostic depth is a meaningful practical advantage.

Common Fault Codes and What They Mean

Both systems display fault codes when operating conditions fall outside acceptable parameters. The most frequent faults on both brands occur when salt level drops below the minimum threshold (below 2,700 ppm on both systems), when water temperature falls below 50°F (at which point both units suspend chlorine generation to protect the cell), and when flow rate is insufficient.

• Hayward “Check Salt” light: salt level below 2,700 ppm or cell scale buildup increasing resistance. Test water with a digital salt meter before adding salt to confirm actual level.
• Hayward “Inspect Cell” light: cell voltage elevated above normal range. Inspect the titanium plates for calcium deposit buildup and perform acid wash if deposits are visible.
• Pentair IC “No Flow” indicator: flow rate below 50 GPM threshold. Check for a dirty filter (pressure above baseline by 25%), clogged pump basket, or pump running at a speed below the minimum needed for that flow requirement.
• Pentair IC “Low Salt” indicator: salt level below 2,700 ppm. Add salt in the deep end with the pump running and allow 24 hours of circulation before retesting.
• Both brands: cell producing less chlorine than expected: most often caused by cyanuric acid (CYA) above 80 ppm, which locks up free chlorine as combined chlorine and reduces the effective sanitizing power. Test CYA with a cyanuric acid test kit and dilute water if CYA exceeds 80 ppm.

Salt Cell Lifespan: What Actually Determines How Long Your Cell Lasts

Both Hayward and Pentair salt cells carry a 3-year manufacturer warranty and are rated for 5 to 7 years of service life under ideal conditions. In practice, most residential cells last 3 to 5 years, with lifespan determined almost entirely by water chemistry management rather than brand choice. The titanium electrode plates in both systems degrade through a combination of calcium scale accumulation (which physically blocks the electrode surface) and acid cleaning erosion (which removes the ruthenium-iridium oxide catalyst coating over time).

The three factors that most shorten salt cell life, in order of impact, are: running the cell at 100% output continuously (caused by undersizing), allowing calcium hardness to exceed 400 ppm without adjusting pH downward to reduce scaling, and performing acid washes more frequently than necessary (which strips the catalyst coating faster than normal operation does).

Water Chemistry Parameters That Protect Cell Lifespan

According to the PHTA (Pool and Hot Tub Alliance) Operator Training Manual, maintaining the following parameters protects salt cell electrode lifespan for both Hayward and Pentair cells:

• Salt (sodium chloride): 2,700 to 3,400 ppm (both brands); operating above 3,400 ppm accelerates scaling on electrode surfaces
• pH: 7.4 to 7.6; pH above 7.8 dramatically accelerates calcium carbonate scale formation on titanium plates
• Calcium hardness: 200 to 400 ppm; above 400 ppm with pH above 7.6 causes aggressive scaling even with reverse-polarity cleaning
• Cyanuric acid (stabilizer): 60 to 80 ppm for saltwater pools specifically; below 60 ppm causes UV degradation of the chlorine the cell produces, requiring higher cell output and more wear
• Total alkalinity: 80 to 120 ppm; alkalinity below 80 ppm causes pH drift and instability that can push calcium into scale formation territory
• Water temperature: both cells automatically suspend operation at or below 50°F to protect electrodes from electrolysis damage in cold-water conditions

Test all these parameters with a Taylor K-2006 complete test kit at least once per week during swimming season and monthly during winterization. Test strips give salt and CYA readings accurate only to within approximately 200 ppm, which is too imprecise for consistent cell protection.

Proper seasonal opening and closing procedures also matter for cell preservation. You can find a detailed checklist covering every chemistry step for opening and closing a saltwater pool at the start and end of each season, including the exact sequence for removing and storing salt cells over winter.

Third-Party Replacement Cells: A Cost Factor That Changes the Math

An underappreciated aspect of the Hayward vs Pentair cost comparison is that both brands have well-established third-party replacement cell markets that can cut replacement costs by 30 to 50% compared to OEM cells. Companies like CircuPool, Astral, and Hayward-compatible aftermarket manufacturers produce drop-in replacement cells for both the AquaRite T-cell format and the IntelliChlor IC format.

Hayward’s T-cell format has a larger third-party replacement market than Pentair’s IC format, primarily because the AquaRite has a larger installed base in North America. This means replacement T-9 and T-15 compatible cells are available from more sources at more competitive price points, with third-party T-15 compatible cells commonly available for $150 to $250 compared to $350 to $450 for a genuine Hayward replacement.

Pentair has historically been more restrictive about third-party compatibility for the IntelliChlor, and some third-party IC40-compatible cells require a firmware version check before installation to verify controller compatibility. The practical result is that Hayward’s replacement cell market is more competitive and generates lower long-term costs for price-conscious owners who are willing to use third-party cells.

One important caveat: using a third-party replacement cell voids the remaining warranty on the control box for both brands if the cell causes a fault that damages the power supply electronics. For pools still under the 3-year system warranty, using the OEM replacement cell is the lower-risk choice.

Which Is Better for Variable Speed Pump Owners?

Hayward wins for pools running variable speed pumps in low-speed filtration mode for 8 or more hours per day. The AquaRite’s 20 GPM minimum flow rate allows continuous chlorine production during low-speed pump operation, while the IntelliChlor’s 50 GPM requirement means the cell idles during those low-speed hours unless the automation controller compensates by raising pump speed.

If your pool already runs a Pentair IntelliFlow variable speed pump paired with a Pentair EasyTouch or IntelliTouch automation controller, the IntelliChlor becomes a sensible choice because the controller manages flow rate on behalf of the SCG. In that integrated setup, the controller raises pump speed to 2,000 RPM (typically 55 to 70 GPM depending on plumbing) when the SCG needs to produce chlorine, then returns the pump to its low-speed setting after the production cycle completes.

The benefit of the Pentair integrated approach is energy efficiency: the automation controller runs the pump at high speed only when chlorine is actually needed, rather than continuously at a speed that ensures 50 GPM all day. For owners who want maximum energy savings from their variable speed pump while still generating adequate chlorine, the Pentair ecosystem’s coordinated control approach can deliver both goals simultaneously, but only with the full automation controller investment.

For owners who converted an existing pool to saltwater without a full automation system, the Hayward AquaRite’s lower flow requirement makes it the simpler and more compatible choice. If you are in the process of making that switch, a complete guide to converting your pool to a saltwater system covers everything from selecting the right cell size to the initial salt loading calculation.

Hayward vs Pentair: Reliability and Owner Satisfaction

Both Hayward and Pentair SCGs receive broadly similar owner satisfaction ratings across major pool owner communities including TroubleFreePool.com, the PoolSpaForum, Reddit’s r/pools, and Amazon verified purchaser reviews. The most common complaints on both brands center on the same root causes: undersizing the cell for the pool, poor water chemistry management leading to premature cell failure, and flow fault issues on variable speed pump installations.

Pentair’s IntelliChlor receives more specific complaints about the 50 GPM flow requirement on variable speed pump installations where the owner was not warned about the compatibility limitation at the time of purchase. This is a sales and specification communication problem rather than a product defect, but it creates a significant number of frustrated new owners who bought an IntelliChlor expecting it to work seamlessly with their low-speed pump settings.

Hayward’s AquaRite complaints center more on the control board, specifically the main board in the control box, which has a documented history of failing due to moisture ingress in humid outdoor installation environments. Hayward addressed this with design updates in later production runs, but older AquaRite units installed in direct weather exposure without cover protection have a higher control board failure rate than IntelliChlor units in similar conditions. Mounting the control box under a pool equipment cover or in a protected equipment bay significantly reduces this failure mode.

Salt production cells from both brands last statistically similar lengths of time when water chemistry is properly maintained. According to aggregated data from the TroubleFreePool.com forum’s equipment review threads, both T-15 and IC40 cells average 4.2 to 4.8 years of service life in high-UV southern U.S. climates with high swim loads, and 5 to 6 years in moderate climates with controlled chemistry.

The Myth vs Fact Reality of Salt Chlorine Generators

Several persistent misconceptions affect how pool owners evaluate and use both Hayward and Pentair SCGs. The following addresses the most impactful ones with specific data.

Understanding how to shock a saltwater pool correctly matters even when you have a top-quality SCG installed. The waiting period after shocking before it is safe to swim depends on which type of shock product you use, something many saltwater pool owners get wrong when switching from the cell’s boost mode to a chemical shock treatment.

Hayward vs Pentair: Feature-by-Feature Verdict

The table below provides a direct feature-by-feature verdict across every specification category that affects a real purchase decision, with a clear winner for each category and the conditions under which that verdict holds.

Who Should Buy Hayward AquaRite?

The Hayward AquaRite is the right choice for most residential pool owners who are not committed to a full Pentair automation ecosystem. Its 20 GPM minimum flow rate makes it the only sensible choice for pools running variable speed pumps in low-speed mode without a full automation controller, which describes the majority of new residential pool installations.

Who Should Buy Pentair IntelliChlor?

The Pentair IntelliChlor is the right choice for pools already committed to the Pentair equipment ecosystem, specifically pools running a Pentair variable speed pump and a Pentair EasyTouch or IntelliTouch automation controller. In that integrated environment, the IntelliChlor’s 50 GPM limitation is managed automatically by the controller, its deeper diagnostics become accessible through the ScreenLogic2 app, and the entire system communicates on a single RS-485 data bus with no cross-brand compatibility issues.

How to Set Up and Dial In Your New Salt Chlorine Generator

Proper initial setup determines how well your SCG performs for the first 90 days, which sets the pattern for long-term operation. Whether you choose the AquaRite or IntelliChlor, the commissioning process follows the same sequence, though the specific readings you target differ slightly between brands.

Buying Decision Checklist: What to Confirm Before You Order

Use the checklist below to verify that you have answered every specification question that determines which model to buy, before placing an order.

Frequently Asked Questions About Hayward vs Pentair Salt Chlorine Generators

Is the Hayward AquaRite or Pentair IntelliChlor more reliable?

Both units show similar reliability when properly sized and paired with compatible pumps. The AquaRite has documented moisture-related control board failures in exposed outdoor installations on older production models, while the IntelliChlor generates a higher rate of flow fault complaints when installed alongside variable speed pumps running in low-speed mode below 50 GPM.

The most accurate reliability indicator for both brands is proper sizing: a cell running at 70% or less of maximum output lasts 30 to 50% longer than one running at 100% continuously. Brand choice matters less than sizing the cell correctly for your pool volume.

Can I use a Pentair IntelliChlor with a Hayward pump?

Yes, the IntelliChlor is electrically and mechanically compatible with non-Pentair pumps. The cell installs in the return line regardless of pump brand. The flow rate limitation still applies: whatever pump you use must deliver at least 50 GPM through the cell.

What you lose when mixing brands is automation integration. A Pentair IntelliChlor paired with a Hayward pump and OmniLogic controller cannot communicate diagnostics to the controller and cannot benefit from pump speed coordination. For mixed-brand installations, the Hayward AquaRite’s lower 20 GPM requirement makes it the more practical choice.

Can I use a Hayward AquaRite with a Pentair automation system?

The AquaRite can be switched on and off via a relay contact from a Pentair automation controller, but it does not communicate data (salt level, cell voltage, production percentage) to the Pentair controller. You lose the integrated diagnostic monitoring that makes full single-brand ecosystems valuable.

If you already have a Pentair IntelliTouch or EasyTouch automation system, adding a Pentair IntelliChlor preserves full data integration and is worth the slightly higher replacement cell cost over time.

How long does a Hayward T-15 cell or Pentair IC40 cell last?

Both cells are rated for 5 to 7 years of service life and carry a 3-year manufacturer warranty. Real-world data from the TroubleFreePool.com community shows an average of 4 to 5 years in southern U.S. climates with high UV exposure and heavy swim loads, and 5 to 6 years in moderate climates with careful chemistry management.

The single strongest predictor of cell longevity is production percentage at normal operation. A cell running at 50 to 60% output lasts significantly longer than one running at 100%. Size up to the next cell model if your pool runs at 100% output continuously under your current setup.

Do I still need to shock a saltwater pool with a Hayward or Pentair SCG?

Yes. Both units include a boost or super-chlorinate mode that raises output to 100% for 24 hours, but this does not replace chemical shock for algae outbreaks, post-heavy-rain events, or when combined chlorine (chloramines) exceeds 0.5 ppm. Pool shock, specifically calcium hypochlorite at 1 lb per 10,000 gallons, is required for those situations.

After using a chemical shock treatment with your saltwater pool, waiting the right amount of time before swimming is important. The specific waiting period depends on the type of shock product used and your current free chlorine reading, which you should verify with a reagent test kit before anyone enters the water.

What happens if my pool’s chlorine level gets too high from the SCG running at high output?

If free chlorine exceeds 5 ppm, reduce the cell’s production percentage by 10 to 20% and retest after 24 hours. If chlorine exceeds 10 ppm, stop the cell entirely until levels drop naturally (sunlight degrades unprotected chlorine at 0.5 to 1 ppm per hour of direct UV exposure). Do not allow anyone to swim when free chlorine exceeds 5 ppm.

Persistent high chlorine despite low production settings usually indicates the cell is oversized for the pool, the pump is running too many hours per day, or the cyanuric acid level is too low, causing the cell to compensate with high output for UV-degraded chlorine. Understanding what causes elevated chlorine levels and how to bring them down safely helps you identify whether the issue is the SCG setting or a chemistry imbalance.

Which brand is easier to install yourself?

Both are similar in installation complexity. Each requires cutting the return line, gluing in union fittings (typically 2-inch PVC), mounting the control box, running low-voltage wiring from the control box to the cell, and connecting to a 120V or 240V power supply depending on the model. Most installations take 2 to 4 hours for someone comfortable with PVC plumbing and basic electrical work.

The AquaRite’s control panel is slightly more intuitive for initial programming. The IntelliChlor’s full programming requires either an automation controller or familiarity with the LED-based menu system, which has a steeper learning curve without the automation screen interface.

Does a saltwater pool at 3,200 ppm salt damage pool equipment?

At 3,200 ppm, sodium chloride does not corrode standard stainless steel (grade 316), titanium, PVC, fiberglass, plaster, or quality rubber seals. It does accelerate corrosion of low-grade stainless (grade 304), untreated aluminum, and certain bronze alloys over multi-year exposure. Check that your pool heater, ladder hardware, and any metal fixtures are rated for saltwater use before converting an existing pool.

Heaters require specific attention. Most modern gas and heat pump pool heaters include corrosion-resistant heat exchangers for saltwater compatibility, but older units may not. Verify your heater model’s salt compatibility in the manufacturer specifications before commissioning a new SCG.

What is the correct cyanuric acid level for a saltwater pool?

The PHTA recommends 60 to 80 ppm of cyanuric acid (also called stabilizer or conditioner) for residential saltwater pools. This range is higher than the 30 to 50 ppm typically recommended for traditionally chlorinated pools because the SCG produces chlorine continuously without the built-in UV protection that trichlor tablets provide (trichlor is 52% cyanuric acid by weight and raises CYA passively with each dose).

If your CYA is already above 80 ppm from previous trichlor tablet use, do not add more. At 80 ppm, the chlorine lock effect begins reducing your effective free chlorine. The only way to reduce CYA is to drain and dilute a portion of the pool water.

The Final Verdict

For most residential pools running variable speed pumps without a full automation controller, the Hayward AquaRite is the better choice. Its 20 GPM minimum flow rate ensures continuous chlorine production at all realistic pump speeds, its standalone diagnostics give you complete data without a controller, and its larger third-party replacement cell market keeps long-term costs lower.

Choose the Pentair IntelliChlor if your pool already runs a Pentair variable speed pump paired with a Pentair automation controller, if your pool volume exceeds 40,000 gallons (where the IC60 is the only residential-grade option), or if your pool sits in the 20,000 to 25,000-gallon range where the IC20 is a better size match than any Hayward model. Start by sizing your cell to at least 1.5 times your pool volume, set initial production to 50 to 60%, keep pH between 7.4 and 7.6, and plan for a manual cell inspection every 90 days. Get those four things right and either brand will deliver years of reliable, hands-off chlorination.