Ch4rlie,
I did not have a 1000gallon tank, but a 1000gallon system. It was made up of a 200, 150, 125, 55s, 20s, 37s, and lotsa 10s for individual fish.
I had some super large fish like a 40 inch RedTail, a 2 foot long Mystis (I think it is Bagrus now) nemuris, a foot long Electric cat, a 2...