Seachem Glass Bubble Counting Spiral Diffuser Pollen 23mm Disc

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.