years ago I got 5 from wes about your size. I started in a 40g with hob filter. I would crush flake food, micro pellets and black worm in the current of the hob. after a week of that, they were hooked. eventually fed them huge cut shrimp and salmon pellets. growth was crazy. I think it was the salmon pellets. temp was 75 I think. lost power in the summer, at a higher temp and lost the last 4. all 18" +. damn. warm water, no h2o. they are great fish. a bit spastic and very very strong. have fun, id remove all objects in the tank if you can. those bulgy eyes can get popped real easy