Regulators and dosing pumps
pH and chlorine regulators and dosing pumps for swimming pools: dosing according to the water reading
A pH or chlorine regulator measures the water with a probe and doses the corrector or the disinfectant with its pump until it reaches the value you set. Here we bring together pH and Redox regulators and control panels from AstralPool, Avady, BWT, CTX, QP and Zodiac, and dosing pumps from AstralPool, CTX, SEKO and Avady.
Chlorine is regulated by measuring Redox (Rx or ORP): the oxidising capacity of the water in millivolts (mV); the more active disinfectant, the more mV. Free chlorine is measured in ppm, and 1 ppm is 1 mg per litre. The Zodiac pH Perfect is on clearance sale, while stocks last.
How to choose a brand
Q-Tech has selected the brands in this collection on technical criteria; for AstralPool, Avady, CTX and Zodiac, also for the good results obtained in our installations. We suggest looking at AstralPool if you want versions from 0.4 l/h for spas up to 5 l/h, or a unit without a probe that can be set to pH or Redox; Avady, if you are after separate proportional pH and Redox regulators, or want to control a salt chlorinator by Redox; BWT, if you want one range for pH, Redox, salt chlorinator Redox and flocculant; CTX, if you need to regulate two parameters on one panel, pH with Redox or with free chlorine in ppm; QP, if you are after a simple pH regulator for pools of up to 100 m³; SEKO, if your chlorinator already measures pH and only needs the pump; Zodiac, if you want alkalinity (TAC) compensation and acid or alkaline correction.
| Brand | What it regulates | Dosing | Flow rate | Maximum back pressure |
|---|---|---|---|---|
| AstralPool | pH or Redox, depending on version | Proportional | 0.4 to 5 l/h | 1.5 bar |
| Avady | pH or Redox, depending on version | Proportional | 1.6 l/h (PRIM pH) | 1 bar (PRIM pH) |
| BWT | pH, Redox or salt chlorinator Redox | Proportional | 1.5 l/h | 1.5 bar |
| CTX | pH or Redox; pH panels with Redox or with free chlorine | Proportional (MyPool DOS) | 1.6 l/h (MyPool DOS) | 1.5 bar (MyPool DOS) |
| QP | pH, acid correction | Automatic | 1.5 to 2 l/h | 1.5 bar |
| SEKO | No measurement: driven by the chlorinator | Fixed flow, manually adjustable | 0.6 to 4 l/h | 1 bar |
| Zodiac | pH | Proportional | 1.5 l/h (pH Expert) | 1.5 bar (pH Expert) |
The BWT, QP and SEKO data come from distributors, as no public manufacturer data sheet is available; the rest come from each brand's documentation.
Summary for information purposes only, prepared by Q-Tech in November 2026 from the technical data sheets each manufacturer publishes, to help you get your bearings among the brands we sell. It is general and indicative: manufacturers update their data and a summary may contain errors, so each product page and the manufacturer's documentation always prevail, without prejudice to your rights as a consumer (Legal Notice). It is common for customers to change their mind once they know each brand's strengths, or to find that a feature they liked is not essential in their case.
A regulator works every day in the plant room, and a choice that does not fit your pool shows up in chemical consumption and in wear on the unit. If you want to decide with the data of your own case, you can book our professional technical advice (a paid service): an Expert Technician reviews your pool and installation with you and guides you with Q-Tech's experience, under an obligation of means (Legal Notice).
Models in this collection
| Range | What it does | Models |
|---|---|---|
| pH or Redox regulators | Measure with their probe and dose pH corrector or chlorine | Control Basic Next, Control Basic Plus, pH Expert, pH Perfect, PRIM pH, PRIM RX, MyPool DOS, Sunny pH, Easy Dose |
| Two-parameter panels | pH with Redox, or pH with free chlorine in ppm | New Vigilant |
| Salt chlorinator control | Starts or stops the chlorinator according to Redox | Chloriprotect RX |
| Pumps without measurement | Dose at the set flow rate or on the signal from another unit | AstralPool peristaltic, CTX peristaltic, PR04 Acti, TEMPO UV |
Data according to each manufacturer. By brand: Avady regulators, AstralPool regulators and CTX regulators.
How to choose a pH and chlorine regulator
- Start with pH: a corrected pH lets the disinfectant work properly.
- For chlorine, Redox in mV is the usual choice; if you want free chlorine in ppm, choose a pH/ppm panel.
- For spare parts and measuring without dosing: pH, Redox and free chlorine probes and Pool water analysers.
Applications
- Pool with a salt chlorinator that needs pH correction.
- Pool with liquid chlorine dosed on demand.
- Communal pool with pH and chlorine on one panel.
Why buy your pH and chlorine regulator from Q-Tech?
- We fit it into a pre-assembled plant room, tested in our workshop, that arrives ready to connect (workshop pre-assembly).
- Technical support for AstralPool and Zodiac with Fluidra Technical Support.
- Questions about which one to choose in a technical call with an Expert Technician or on WhatsApp.
Frequently asked questions
What is the difference between regulating by Redox and by ppm?
Redox measures the oxidising capacity of the water in mV, which depends on chlorine and also on pH. A ppm reading gives the milligrams of free chlorine per litre and needs a specific probe.
Does stabiliser affect the Redox reading?
Yes. Avady states that its Redox measurement needs water with no more than 15 ppm of stabiliser (cyanuric acid).
Do I need a pH regulator if I have a salt chlorinator?
Usually yes, because the chlorinator produces chlorine but does not correct pH, unless it has its own pH control.
All water control is in pH and chlorine regulation; regulating by reading avoids dosing blindly.
FP54·261112