I didn't want to start trouble over tank size. I will get a larger tank as soon as it is needed. I think that we all can agree that it's ok to keep four 1" fish in a 30 gallon tank. I totally agree that this is unacceptable for a full grown piranha, let along four and, like I said, I will get a larger tank when that time comes.
For right now, does anybody have any useful advise? I really appreciate anything that you guys have to offer. MoNkEy~BrAiN, good advise on temperature, feeding and decor; these are the kinds of things that I'm looking to hear.
PEVINE11, what do you consider over filtered? Right now I'm turning my tank over about 7 times per hour.