I am thinking about getting a south american lungfish that is about 2 feet long. The tank I want to put it in has a 16" RBP, a 18" TSN and an 18" silver aro. The tank is a 750. I have read lots of contradictory info on these lungfishes. Some say they should only be kept alone, and will eat everything else in the tank. Others say they seem to be pretty mellow. Will this combination work?

