pH regulators

The pH of pool water affects the chemical balance, the performance of certain disinfectants, swimmer comfort, and the preservation of the installation’s materials.

A pH outside the appropriate range can contribute to problems such as irritation, scaling, corrosion, or reduced effectiveness of certain treatments.

For pools treated with chlorine, a pH of approximately 7.2 to 7.6 is commonly used as a reference, although the appropriate range should be established according to the treatment system and the recommendations applicable to each pool.

A pH adjuster is the chemical product used to increase or decrease the water’s pH. pH- lowers its value, while pH+ raises it.

An automatic pH regulator is a device that normally uses a probe to measure pH and a dosing pump to automatically add the adjusting product when necessary.

Therefore, they are not equivalent products: the automatic regulator requires a compatible pH adjuster to carry out dosing.

It is not essential for every installation, but it can be a particularly useful addition for pools with salt electrolysis.

These pools also need proper pH control and, depending on the water characteristics and how the installation operates, may require periodic adjustments.

An automatic regulator automates measurement and dosing, reducing the need for frequent manual adjustments, provided that the equipment is correctly installed, calibrated, and maintained.

It depends on the results of the water analysis.

pH- or pH reducer is used when the value is above the desired range, while pH+ or pH increaser is used when it is below it.

The product should not be chosen solely based on the type of pool or disinfection system. The pH must first be measured, after which the appropriate adjustment should be made according to the product’s dosage instructions.

In addition to the pool volume, it is advisable to check the dosing flow rate, pump type, compatible chemical product, measurement range, calibration system, connections, and installation specifications.

If it is going to be used with a salt chlorinator or another automatic treatment system, its compatibility and the planned installation layout must also be checked.

Therefore, it is not advisable to choose a pH regulator solely based on the pool’s cubic-meter capacity.

The pH probe analyzes the water, and the controller compares the reading obtained with the programmed setpoint.

When the equipment detects that an adjustment is needed, it controls the dosing pump to add the appropriate product according to its configuration.

Operation, dosing method, and safety systems may vary between models, so the manufacturer’s instructions must be followed.

Installation depends on the model and must be carried out according to its hydraulic and electrical diagram.

Typically, one suitable point is needed for measurement using the probe and another for injecting the pH adjuster, in addition to installing the dosing pump and its corresponding suction and delivery tubes.

The position relative to the filter, salt chlorinator, electrolysis cell, and other dosing systems is important. There is no universal arrangement valid for all equipment, so the manufacturer’s specific diagram must be followed.

Although it automates part of the water treatment process, the equipment still requires periodic maintenance.

It is advisable to check the probe reading and condition, calibration, dosing pump, tubes, injection point, and level of the adjusting product, as well as any other components specified by the manufacturer.

It is also recommended to periodically compare the equipment reading with an independent measurement to detect possible deviations.

There is no universal calibration frequency or exact service life for all probes.

The frequency depends on the model, water conditions, maintenance, and the manufacturer’s recommendations. Calibration should also be checked if abnormal readings or significant differences from a reference measurement appear.

A probe may need to be replaced when, after carrying out the prescribed cleaning and calibration procedures correctly, it does not maintain a stable reading or can no longer be calibrated within the equipment’s tolerances.

The main advantage is that it allows the pH to be measured and adjusted automatically according to the equipment’s configuration.

This can reduce manual intervention and help maintain the parameter more consistently, which is especially practical for pools that require frequent adjustments or already have other automatic treatment systems.

In return, it requires an initial investment, installation, adjusting product, and periodic maintenance of components such as the probe and dosing pump.