i have a ten gal in the bottom of my 125gal stand (see avatar) and it WAS used for feeder fish for my RBPs but i have moved up and got a 75 gal for the feeders so what would be a good fish for the 10 gal keep in mind that there are going to be there fantails in it (used to keep bio system going when empty and it has a backfilter powerhead and undergravel filter in it and due to the placement in the room WITHOUT a heater the temp stays around 80 so what would work good in this tank