For aquariums up to 75 L-190 L (20-50 US gallons)
Large surface area of diffuser disc ideal for high volumes of CO2 gas
Built in bubble counter makes the use of a separate bubble counter unnecessary
Simple and easy to use
 
The Spiral Bubble Counting Diffuser is a pollen style CO2 diffuser that connects to CO2 injection systems to easily disperse CO2 gas into the planted aquarium. The built-in spiral bubble counter allows for easy monitoring of the rate of CO2 injection. The inclusion of a bubble counter in the diffuser makes the use of a bubble counter on the CO2 tank or in-line unnecessary. The Spiral Bubble Counting Diffuser has a 30 mm disc.