my CK loves massivore.he was raised on guppies till he reached roughly 8" then stoped feeding for 1 day and switched him over to cut tilapia.once he reached around 12 to 14" i stoped feeding again for 2 days and he started eating massivore.currently at 23" he eats 5 massivore pellets a day 5 days a week and cut tilapia 2 days a week.