I currently have 4 bluegill (6 in), I checked the identification thread, and this is what it said they were, and a common pleco (8.5 in) in a 125. Is this over/under/perfect stock. I"m thinking of a bullhead catfish, or a crappie. What do you all think. As for filtration I have a Rena xp3 and an under gravel filter with tow maxijet 1200's. The temperature is set at 71degreese