Im lookin to buy a tank between 100-200 GALLONS and i was lookin for any ideas for the fish that i should put in the tank. I was lookin to make it a monster fish tank. I was also wondering if that sized tank would be enough for a redtailed catfish. I have a red belly piranha right now in a tank by itself so a shoal of piranha could be a possibility. I AM OPEN TO ANY SUGGESTIONS...NO MATTER HOW RIDDICULOUS