I have a cycled, 30 Gal tank, medium to heavy planted, soon to add drift wood, with gravel and I'm wanting a predator fish to go in it. I have ways to buy and sell so I can do a fish that fully grown needs a bigger tank but I would prefer one I could keep. I would like a fish that eats other fish. Right now I only have guppies, loaches and a few algae eaters in it. I dont mind if they are eaten as I have lost interest in the tank. Any suggestions?