Parts for yeast Co2?
I ask a question in my other thread (yeast Co2 @ night). I am going to post it here as well in hopes it will be seen. My parts include 2 liter bottle, bulkhead fittings, silicone lines, a check valve (is this needed?), fine airstone, sponges and a powerhead and the cup part of a siphon there anything there that is not needed. Or is there something that I am missing?