2 kelberi ~10" 1 orino ~8" about 2 yrs. old, been trying to convert to frozen fish, smelt, for the last month but still not taking any. Actually 1 of the kelberi started to eat smelt already for about 2 weeks now but 1 orino and 1 kelberi - not a chance. I am starting to breakdown already and just been giving them back their massivore, but 1 or 2 pieces a day only,. Any advice. Should I starve them some more their belly are already sunk in. My reason for converting them to frozen fish is "economics". Is it worth even to convert them to frozen fish ? what's the advantage of feeding frozen fish?