beertard
Member
Here is a pic of my homemade O2 system. Just a tank and a O2 regulator from a welding kit, basic hardware store parts. It probably cost about $15. Quite a savings compared to those commercially availabe. I stuffed the bottle full of wet paper towels since my LHBS did not carry HEPA or any inline filters. The tubes and airstone are from a pet store - $2. When I tured it on the fermentor looked like there was a whirlpool jet going off in the bottom. Two hours later, airlock was bubbling like crazy.