[the4x4hoss]

I just added CO2 to my 135Gal and all of my fish have started to congregate in one of the top corners of the tank where the flow is lower than the rest of the tank. I am guessing they are tying to avoid the CO2?

It is DIY but I am getting 2 bubbles per second and I have a diffuser in my sump right in front of the pick up for the pump. I really hope the fish will acclimate to the higher CO2 levels and return to the normal routine. It would be a shame to kill the $80 worth of fish I put in on Saturday.

 

[Lugnut]

Are you measuring the Co2 at all? Sounds like you are gassing your fish. I would throw in a air stone or something to get some oxygen in there unless you know for sure that the Co2 level is low enough.

 

[the4x4hoss]

I am new to the planted tank thing and the only thing ive seen is the bubbles per second measurement. The water is aerated by pulling air through the plumbing and into the sump and it bubbles from the bottom of the sump through about 8" of water.