CO2

Calibration solution with pH 4.0 for pH electrodes.

Calibration solution with pH 7.0 for pH electrodes.

A refill can of CO2 Depot for the Tetra Optimat set.

Controls the CO2 supply via a timer switch (semi-automatic regulation) or a pH-regulator (fully-automatic regulation).

Complete CO2 reactor for aquariums up to 400 liters. Special features: Variable diffusion space, does not require its own pump, suitable for aquariums up to 400 liters.

The  CO2 Reactor S is perfectly suited for the optimum and almost maintenance-free  CO2 fertilisation in large aquaria.

The CO2 Set Delta 400 is recommended for aquaria up to approximately 400 litres in capacity. The set is based around the Dupla CO2 Reactor 400, a unique and sophisticated device for optimum CO2 infusion.

Dupla Co2 O-Ring for Dupla Co2 Fixtures.

CO2 indicator which measures CO2 levels in your planted aquarium.

Bacteria, lime and other impurities which settle on the electrode can falsify the real pH value. The regular cleaning and calibration of the electrode ensure precise measurement and an unaltered pH value. Electrodes always need to be stored in a humid pla

Solution for the cleaning and storage of pH electrodes for aquariums.

pH control unit for CO2 dosage.

This practical CO2 direct diffuser saves a diffuser in the aquarium, a bubble counter and a check valve. It even saves 20 % CO2 thanks to its ingenious functioning. All that is needed is an external filter with a suitable hose connection.

JBL ProFlora Safe Stop is a special non-return valve for CO2. Non-return valve with washer, pre-tensioned by a spring, preventing water leaking into the pressure regulator and CO2 cylinder. CO2 has a very powerful diffusion strength which, if a normal non