I've got a 10in + buttikoferi in my 180. With a pacu 10in+ and super red dragon flowerhorn. They are eating close to 50 goldies a week with the hikari pellets. Some carrots and the occasional blood worm. They all eat about the same. Except the buttikoferi eats. I can't for the life of me think of the name of the little lobster looking thangs I put in there but a couple of them a week and a couple nutts for the pacu a week also. But all in all the buttikoferi. Manily seems to favor live food. In my tank. Healthy as can be. Just know yours will get big and if you value your investments they better be highly agressive or have great hiding places. My buttikoferi will move rocks to get to some of the smaller 4-5 in lm's I have in there oh also have a 8in electric blue jack. That's the buttikoferis favorit punching bag