Colombo CO2 Solenoid Valve CO2 Humate containing substrate

Humate containing substrate

and pull the tweezers away

Stable and Secure: Designed to stay firmly in place within the aquarium

Use the included colour rings and hose clips to colour code your supplements

Colombo CO2 Solenoid Valve CO2 Humate containing substrateThe Colombo CO2 Solenoid should be used with a domestic timer (just like your lights timer) and automates when your CO2 comes on and off. We recommend it comes on 1 hour before your lights come on and turn off 1 hour before they go off (this is optimal). By using this solenoid you will not only save a lot of gas, reduce any risk to your fish shrimp and save you plenty of money (as you won't need to purchase CO2 bottles as often). This is compatible