what is the growth rate for crenicichla(particularly lent, cincta, mars and tapajos II"cobra")? i have recently become very interested in keeping crenicichla over the last 2 weeks or so. they will be going into a 180 g which will be filtered by a 55g sump(with bio-tower) and fx5. there will be plenty of driftwood and places for them to ambush. is there anything else that the pike experts would recommend?