Seachem Glass Bubble Counter 17mm diameter (3158)

The Bubble Counter is a simple and elegant tool for monitoring the rate of CO₂ injection in planted aquaria. This bubble counter is placed in the CO₂ gas line, which minimizes visibility of CO₂ equipment in the aquascape while still allowing the hobbyist to easily check CO₂ output at any time.

Compatible with 6 mm (1/4") - Standard Airline Tubing.