I'm having possible CO2 issues specifically related to one of my tanks, and I'd like to ask a general question:
Knowing that surface turbulence helps release CO2 and add O2, how much better an idea is it to use a canister filter than a HOB filter in a planted tank with CO2? (In my case, DIY CO2)
P.S. I have a HOB aquaclear 70 for my 30g cube. pH and KH have not appeared to change between before and after lighting periods (though I have been using an API KH kit rather than the recommended Seachem KH kit). I'm currently using a powerhead at the bottom of the tank as my diffuser. I realize a glass/ceramic diffuser would work better, or even possibly a bell at a high flow area, but this *should* be working, and I'm not sure it is. Any comments welcome!