don't you think daily is a little unnecessary? Especially if the tank is "huge" I'd do bi-weekly changes, and just feed him a balanced diet of foods that are high in protein. Shrimp, earth worms, silver sides, fish fillet cuts, chicken gizzards, pre-soaked freeze dried krill etc. But what is the need to grow him super fast? They average around an inch a month any way? The only reason I'd see for power feeding a rtc is if you want to add him to a very large community with fish that are much larger then him/her and you are trying to get s/he to catch up. Keeping a cat over stuffed all the time isn't exactly good for the digestive track.