Originally Posted by mr_X
power heads are on both sides of the tank as far as i can see. you won't lose fish to them unless they are sick from the time you put them in.
koralias ARE power heads.
Oh yea I know I was just guessing he was referring to the ones that suck with the tubes.
I got another question for you though. I did the 15 gallon water change and just tested the water and everything seems to have gotten worse. PH is only 7.4ish the nitrite is 1.0, the nitrate is around 5.0 and the ammonia is 0.50. Do I need to do anything to the media in my AC70. I also have some PH buffer, or should I just wait since the water change was done only this morning? Thanks