martyn21uk
Fish Crazy
My question is - I am currently treating my 40l with anti internal bacteria so I have my 4" airstone turned full up to increase oxygen as much as possible. I normally have it turned down quite a bit because its a really powerful pump. But I quite like the look of having it on full on so would it do any harm by having it full on in the long term after I've finished medicating? Can you have too much oxygen in there?