So a friend of mine got divorced and had to give up all of his fish. I went over to see what he had and he was trying to re-home a white giant gourami. It's at least 18" and since I have a 240 gallon tank with just a few fish in it now I said I would take her. She has been getting increasingly aggressive towards her tank mates recently, and yesterday I had to force her to spit out my 12" pleco she was trying to eat tail-first. I think she may not be getting enough food, so I am looking for help understanding what to feed her. I have been giving her lettuce leaves, not sure how much I should give her and what I could supplement it with. Any help would be greatly appreciated.