i have a co2
dyi i just bought for my smaller tank 40 gal
and i have plants but i don't understand really what I'm dong with the diffuser at all. Are the bubbles supposed to be going to the top and popping or should the be staying in and around the tank?? i saw online people saying they need to stay in the tank not bubble to the top like a air pump would.
any advice please i dont want to waste my time doing the dyi co2
if i won't even be doing it right