Want to automate your pool water treatment and enjoy crystal-clear water all summer? A salt chlorinator β also known as a pool electrolyzer β is one of the simplest and most effective solutions available. Here's everything you need to know, including a complete buying guide and our comparison of the best models on the market.
What Is a Pool Salt Chlorinator and How Does It Work?
A salt chlorinator automates pool water maintenance, working alongside an automatic treatment system, a water analyzer, or a pool robot. Pool water is naturally a breeding ground for microorganisms, algae, and other organic matter. A salt chlorinator solves this with electrolysis β no direct chemical handling required. Simply add pool salt; the device does the rest.
Here's how the process works in six steps:
- Salt is added to the pool at a concentration of 3,000β4,000 ppm.
- The salty water is channeled through a pump into the electrolysis cell.
- Electric current applied to the electrodes separates sodium chloride into sodium and chlorine ions.
- Chlorine ions form chlorine gas.
- The chlorine gas dissolves into hypochlorous acid and sodium hypochlorite β powerful disinfectants that eliminate algae, bacteria, and organic matter.
- UV rays from the sun convert the chlorine back into salt, restarting the cycle automatically.
The result: thoroughly treated, skin-friendly water without the harsh effects of direct chlorine products.
The 6 Best Pool Salt Chlorinators β Our Comparison
1 β Bayrol Salt Relax PRO
| Volume | Salt | Pool type | Link |
| Up to 18,500 gal | 3.3 g/L | All types |
A premium chlorinator built for serious pool owners. Deep-cleans via electrolysis, with a built-in pH function that monitors and automatically regulates water pH. Works at very low salinity β ideal for pools sensitive to corrosion. Features a self-cleaning cell, integrated temperature sensor, and the ability to adjust water jets and add supplementary treatments.
Pros: Suitable for all pools, treats up to 18,500 gal, temperature sensor, self-cleaning cell.
Cons: High price.
2 β Gre SCG100 β Salt Chlorinator
| Volume | Salt | Pool type |
| Up to 26,400 gal | 4 g/L | In-ground and above-ground |
Built for large pools. The Gre SCG100 delivers high chlorine productivity for effective treatment of cloudy water, plus a powerful shock chlorine mode that releases a high volume of chlorine for green water emergencies β all without resorting to chlorine tablets or bleach.
Pros: Ideal for large pools, shock chlorine mode.
Cons: Requires a higher quantity of salt.
3 β Zodiac Gensalt OT25 β Salt Chlorinator
| Volume | Salt | Pool type |
| Up to 29,000 gal | 4 g/L | All types |
Designed for continuous automatic treatment of large pools over extended periods. Releases minimal amounts of chlorine for thorough yet gentle disinfection β no chlorine smell, none of the undesirable side effects of direct chlorine use. Available in three models adapted to different pool volumes. Quick and easy to install.
Pros: Optimal water treatment, fast installation, 3 volume-matched models available.
Cons: Higher price point.
4 β Zelia ZLT β Smart Salt Chlorinator
| Volume | Salt | Pool type |
| Up to 6,600 gal | 2β5 g/L | All types |
A smart and compact chlorinator with an ergonomic design that installs without drilling into pool piping. Chlorine production adapts automatically to water temperature. Measures existing chlorine levels and limits production accordingly β preventing over-chlorination. Multiple programmed and thermo-regulated operating modes. Excellent value for its feature set. Available in three capacity models.
Pros: Thermo-regulated modes, programmable modes, chlorine production auto-limited by existing levels.
Cons: Lower treatment capacity.
5 β Gre ESB55 β Pool Salt Chlorinator
| Volume | Salt | Pool type |
| Up to 14,500 gal | 4 g/L | Above-ground and in-ground |
Equipped with reactive metal-coated electrodes for reliable everyday chlorine production. Can also ramp up output for algae or bacteria outbreaks. Eliminates the need to handle multiple chemical products. Multiple operating modes available for flexible pool maintenance.
Pros: Multiple operating modes, compatible with above-ground and in-ground pools.
Cons: Limited to smaller water volumes.
6 β Intex 26670 QS1200 β Salt Sterilizer
| Volume | Salt | Pool type |
| Up to 15,000 gal | 3 g/L | Above-ground pools |
The most affordable option on this list and accessible to all budgets. Keeps above-ground pools safe from microbial invasions with adaptive chlorine output based on temperature and other parameters. Best suited as an entry-level salt treatment solution for above-ground setups.
Pros: Accessible price point for all budgets.
Cons: Limited water volume, above-ground pools only.
How to Choose Your Pool Salt Chlorinator β Buying Guide
Pool Size
Always check the maximum treatable volume listed in the chlorinator's specifications. This is the first filter for narrowing down your options. Larger pools significantly reduce the number of compatible models available.
Water Quality
Dirtier water requires higher chlorine production. Check the chlorinator's production rate to ensure it can handle your pool's specific conditions β including water temperature, ambient climate, and the pool's installation environment.
Pool Lining
Confirm that the chlorinator's housing and cell are compatible with your pool lining β PVC, plastic, wood, or other materials. Incompatible components can cause damage over time.
Maintenance Requirements
Be honest about how much time you can dedicate to upkeep. Some chlorinators require regular weekly checks; others are nearly set-and-forget. Choose a model that fits your lifestyle.
Budget
List your pool's characteristics first to narrow down compatible models, then set a clear budget. Keep an eye out for promotional deals β a well-timed offer can save significantly on a quality unit.
Installing and Maintaining Your Salt Chlorinator
Installation is straightforward. Set up a circuit with a bypass kit and appropriately sized hose. Connect the cell and install a flow detector (if included) β this automatically shuts the unit down if water flow drops too low, protecting the chlorinator from damage.
For maintenance: a simple weekly routine check and periodic inspection of key components is generally all that's needed. Most modern chlorinators are low-maintenance by design.
A salt chlorinator is one of the most effective and skin-friendly ways to maintain pool water quality. Use this buying guide alongside our comparison above to find the right model for your pool β and enjoy healthier, clearer water all season long.
FAQ: Saltwater Pool Electrolyser
How does a saltwater pool electrolyser work?
The electrolyser breaks down sodium chloride (salt) in the water through electrolysis: an electrolytic cell splits chloride ions into active chlorine (hypochlorite) which disinfects the water. This naturally produced chlorine is identical to standard chlorine but requires no chemical handling. The recommended salt concentration is 3 to 5 g/L.
What salt level is needed in a pool with an electrolyser?
The optimum salt concentration is between 3 and 5 g/L depending on the manufacturer (generally 4 g/L). Below 3 g/L, chlorine production is insufficient. Above 6 g/L, the water can irritate skin and eyes and accelerate corrosion of equipment. Test salt levels at least monthly with a salinity meter.
Do I still need to add chlorine with a pool electrolyser?
Under normal operation, a properly sized electrolyser produces sufficient chlorine. However, during a chlorine shock (start of season, after a storm or heavy use), an addition of granular or liquid chlorine is still needed as the electrolyser alone cannot produce enough in a short time.
What is the lifespan of an electrolysis cell?
The lifespan of an electrolysis cell varies from 3 to 7 years depending on the brand, water quality and frequency of use. Excessively low pH accelerates plate degradation. Annual descaling of the cell extends its life. Replacing a cell costs β¬150 to β¬500.
Is a pool electrolyser compatible with all pools?
Electrolyser systems are suitable for in-ground, semi-in-ground and above-ground pools, provided the equipment is saltwater-resistant. Avoid using electrolyser systems in pools with unprotected reinforced concrete structures. Liner, tiled or polyester pools are fully compatible.
