Aquarium CO2 bottles and regulators for calcium reactors

The Aqua Medic bubble counter is a simple and safe unit for controlling the CO2 dosage into aquariums. It is filled up to the half with water and switched between pressure regulator or solenoid valve and the CO2 reactor, so that it remains without pressure. An integrated check valve prevents water from flowing back.

Manufacturer's Website
Price: £12.00

Aquamedic Gas Solanoid

The Aqua Medic Solenoid Valve is a quality valve with pressure fittings for 6-mm flexible hose. The body of the valve is made from brass and is chrome plated. To prevent overheating, the valve uses 3.5-watt electrical power. The maximum useable gas pressure 6 bar. The valve can be connected to all CO2 units. Together with a timer, the valve can be used as a night shut off. In combination with a pH controller automatic control of the CO2 supply and the pH value.

Manufacturer's Website
Price: £37.99

DD Deltec Saltwater CO2 Complete
High quality CO2 set for running Calcium Reactors in salt water aquariums comprising of:

600 GRM, (full) disposable gas cylinder.

Regulator with high presssure and low pressure gauges and secondary pin wheel control.

Intergrated non return valve and bubble counter,

8 bar electric solenoid plus tubing and ptfe tape.

(Note the photo shows Rowalith C this comes with the calcium reactors)
Price: £112.99