Aquarium CO2 Bubble Counter with Built-in Check Valve for CO2 Generator Regulator, Double-Head

This is a great bubble counter. All of the pictures show it connected upside down though. It only works if the bubble stem inside is set on the CO2 end.

I bought 4 and I only had them for a day at the time of writing this review. Out of the 4 I purchased, one of them has a defective check valve. The replacement policy is nice and for 10 bucks id say it was worth the risk. Definitely is a nice short term option if you are looking to save up for a better co2 kit. Paired it with a fluval 45g co2 kit.

They work well enough. I have mine connected to a splitter off my single stage co2 regulator so that I can split one regulator into 2 aquariums without buying an expensive dual output regulator. They hold onto the lines well and seem to act as a decent check valve.

This Bubble Counter Is Pleasing To Look At And Very Accurate

Fits 3/16" ID co2 line. Withstands the pressure and doesn't leak.