I have a story, but the Idiot is not me instead it's an employee who I talk to today when I visited one of my LFS. I suggested to him that I'm looking for maybe a 20 gallon tank, as I was thinking of setting a piranha tank(maybe a couple) and he told me that the bare minumum for one piranha is a 75 gallon tank I played along and also he pointed out to me a 125 gallon tank which is around $1200 and told me oh you could put a bunch in there but they might get nasty with each other. One Hell of Salesman eh!!!!!!!!