I was given this fish after he outgrew his 10gal tank, he is in a 30 gal and doing fine now but I am wondering how big he will get, I was told a blue tilapia cichlid. he eats and loves cichlid pellets and does fine with lemon tetras and corydoras. he digs caves in the substrate and hangs out in them. he is currently around 7" anyone have any ideas??