Forgot to add, discus are grazers which means they will cruize around and try to nibble for food all day, and shouldn't be allowed to eat TOO much in one feeding. So feed as often and in little quantities as your day permits. I found using a worm/feeding cone works for me. Took them a little bit of time to get used to but now they swim up to the cone as often as they feel like having a munch. I always put a mix of food in there: colour bits, pellets, bloodworms, bringshrimp, and it lasts for about an hour while they pick on it. Helps save me standing there when i don't feel like it too