The ista CO2 Bubble Counter (2 in 1) has a check valve in addition to the bubble counter. Perfect for use with the ista Max Mix CO2 Reactor Medium and the ista Max Mix CO2 Reactor Large (it ´s impossible to control the CO2 flow using only the reactor).
Features:
2 in 1 functions: CO2 bubble counter and check valve
Spring type check valve is the best in preventing back flow
Acrylic material provides clear and easy bubble reading. Acid and break resistant
