newbee: if you're primarily interested in feeding the bream and catfish use the Purina Fish Chow. As others have testified, it has two pellet sizes and is formulated to produce good growth and healthy fish, plus it is economical. Fish will eat dog food but it is formulated for warm blooded animals esp. dogs not fish. Growth will not be as good as with a fish food ration. If if was for fish the bag would say so.