Ferrosalt Duo : water treatment using Salt electrolysis

Understand salt electrolysis in 4 steps

1. Ferrosalt Duo : The Concept

2. Measure and adjust pH and Chlorine


  To guarantee clean and safe water, the Ferrosalt Duo automatically regulates the pH (acidity) of the water between 7.2-7.6 and the chlorine content between 0.5 and 1.5 ppm

  • The pH is measured continuously with a pH probe.

  • Chlorine is measured by a Redox probe for salt electrolysis. In general, a Redox of 700mV corresponds to 1 ppm of chlorine. The redox sensor is covered with a protective layer of gold.

  • If the pH is too high, the system will automatically dose acid to correct the pH via a peristaltic pump. For a swimming pool of 50 m³ you need +- 15 to 30 cl 15% sulfuric acid (= one glass) per day.


     pH probe                                  Redox-graph (7 days) 

  To adjust the chlorine, the salt electrolysis will automatically produce chlorine (or bleach) via a salt electrolysis cell. For a swimming pool of 50 m³, you need a salt electrolysis device that produces at least 15 g of chlorine per hour.

For a salt electrolysis to work, it is necessary to add salt to the pool beforehand. This salt is then converted into chlorine by the electrolysis cell. After reaction of the chlorine with algae, bacteria ... the chlorine is converted back to salt.

3. Plug & Play - water treatment installation


  Both the Ferrosalt Duo  and the Ferrosalt Duo Wifi  are fully pre-assembled on a plate. All connections and pipes have already been made, so no need to assemble anything yourself. Simply connect the panel to the return pipe to the pool in a 50mm pipe. This can be done via the supplied 50mm rubber sleeves. A bypass is not required.

All accessories for installation and use (probes, calibration fluid, manual ...) are included. The normal operating conditions (pH 7.2-7.6, Redox > 700mV) are already pre-programmed in the device.

   Important note for UK and Ireland customers

A suitable 50mm to 1-1/2 inch adapter will be provided upon delivery without extra charge

4. Wifi or Display


  The Ferrosalt Duo is available in both WiFi version  and Display version .

The WiFi version works via the "Wifipool app". The advantage of this solution is that you can verify and adjust your water quality literally anywhere in the world. You can also measure and adjust other parameters of your swimming pool (temperature, level, flow) via the Wifipool app and equipment.

The Display version is one of the easiest water treatment devices on the market. You can read pH and Redox (Chlorine) via the display.
Via the handy menu you can change the pre-set parameters (language selection, pH and redox set point etc ...).

Both devices work in the same way: they continuously monitor the pH and the Redox (Chlorine). As soon as one of the two needs to be adjusted, the salt electrolysis and/or pH pump is activated.