Some cories ignore flake. The bug bites are excellent. There was a feeding discussion on Corydoras World last week, and Ian Fuller pointed out that the natural food for cories is insect larvae and insects, which is why the Bug Bites is so good for them. Cories do not need a lot of protein, and flake foods are often high in protein. Cories do not eat that many worms, so that lowers the protein and fat (another reason to have no more than one feeding of worms/bloodworms a week). Frozen daphnia is excellent...fresh frozen, not freeze dried. Cories will graze algae mats and may digest some of the algae along with the insect larvae and similar they are looking for. They also tend to swallow sand, since they are filter feeders, though obviously they obtain no nutrition from the sand, it just passes through (another reason to have smooth sand!) The sinking prepard foods intended for corydoras are better quality. I mentined Bug Bites, another is Omega One's shrimp pellets. I feed these two, and also once a week the Omega One Veggie Round just so they get a tad of algae. You do not want them getting too much of this either, it causes various issues (as will high protein diets).
