Review on 🌬️ U.P. Aqua Brass Bubble Counter & Check Valve: Optimal Air Flow Control for Aquarium Enthusiasts by Victoria Smith

I built a CO2 system for a series of plant nanotanks powered by a single cylinder. This bubble counter was the most expensive I've bought from Revain but was the clear winner. The plastic is thick and strong, and the brass makes it rust-resistant and durable. The built-in check valve is a great advantage. Other bubble counters leak or break easily. After trying other brands I'm buying three more so all my tanks use the same quality bubble counter.