pH Control Set – CO₂ control kit

This set is intended for planted aquarium keepers who want CO2 dosing controlled by pH rather than adjusted by hand. It combines the AquaViva Pro pH controller with the MicroFlex solenoid valve, so the CO2 supply follows a target pH value that the keeper sets on the unit.

Why it matters

• The AquaViva Pro reads pH through a probe and compensates for water temperature, which is measured by a separate temperature probe. Both readings feed the control logic.
• The controller mounts directly on the CO2 cylinder, so the pH probe and the valve are kept in one assembly rather than spread across the stand.
• The MicroFlex valve is powered directly from the controller, so the included power supply is not needed for normal operation.
• Calibration is done with the included 4 pH and 7 pH buffers and a triple calibration cup, which lets the keeper check the probe before setting the target value.

Specifications

• Setpoint range: 5.0 to 9.0 pH
• Display range: 1.0 to 13.0 pH
• pH accuracy and reading resolution: 0.1 pH
• Temperature reading range: 10 °C to 40 °C
• Controller dimensions: 7 x 2 x 10 cm
• pH probe holder: fits glass thickness from 4 mm to 25 mm
• pH probe cable: 200 cm
• Temperature probe cable: 150 cm, with suction cup
• Power supply cable: 120 cm
• Weight: 0.63 kg

Package contents: MicroFlex solenoid valve, hose clamp nuts, AquaViva Pro controller, pH probe with glass holder, temperature probe with suction cup, 4 pH and 7 pH calibration buffers, triple calibration cup, velcro cylinder pouch, power supply, product packaging, and instructions in Polish and English.

What it works with

The set is designed for planted freshwater aquariums that run pressurized CO2 from a cylinder. The pH setpoint range of 5.0 to 9.0 covers the working range the controller is built for, and the 0.1 pH resolution gives fine control over the dosing. The probe holder fits a wide range of glass thicknesses, from 4 mm to 25 mm, so it can be used on most standard aquarium walls. The enclosure is 7 x 2 x 10 cm, which leaves room on the cylinder for the pouch and hose connections.