Brian_Nano12g
Aquarium Advice Addict
Well my bubble counter is filled with water.. It separates any potential yeast seepage from getting into the aquarium. The bubbles are gas co2 is it not? I did my research prior to building my DIY setup and numerous sources say to use a check valve. When there's no more forward pressure to displace water, then it will start to head the other way into your diy system.