SR Aquaristik Aquarium Dual Stage CO2 Regulator KitFOR AQUARIUM PLANTS CALCIUM REACTORSIdeal for planted aquariums and calcium reactorsPrecise control of CO2 outputDual stage valve for added safety and reliabilityDisplays canister pressure & CO2 outputCompatible with most ph controllers and standard timersProduct Description:TheSR Aquaristik Aquarium Dual Stage CO2 Regulator Kitis used to regulate the flow of carbon dioxide from standard North American CO2 bottles. Ideal for use in planted aquariums or for supplying CO2 to calcium reactors for reef aquariums or any other applications that require precise CO2 control. The CO2 regulator comes complete with large control output knob that dramatically reduces the chance of accidentally changing output volume, on/off electronic solenoid that can be used with a pH controller or timer, bubble counter and extra regulator seals.Product code: 7850Item No. CO-SR-0735