Review on 🐠 S.T. International CO2 Hanging Bubble Counter with Check Valve - Optimized for Aquariums by Clare Thoms

Do not buy. Even with teflon tape around the threads, CO2 was still leaking out of the top cap. Some CO2 came through the line but not enough to keep my built in CO2 diffuser going. Insufficient pressure due to a leak. Everything was fine, outlet pressure, BPS etc. I disconnected the bubble counter and plugged the CO2 hose straight into the regulator and a fine mist appeared in my tank immediately. Pretty expensive for something that doesn't work. I hope nobody has the same problem as me. They're aluminum and the plastic is pretty thick, but the threads on the plastic look very cheap, and they are. There are gaskets in the lids, but obviously they don't do the job. Wouldn't recommend it.