I have not fed them this morning yet. Should fast them for a day and start with their peas tomorrow and Progold on Sunday or just start with the Progold today. I have not seen alot of poop in the tank, but then I never do as I think my filters get it before I see it. But with the Metro-Med being a harder food, even though I soaked it for at least 1/2 hour before feeding, I did not know if the fish had problems with constipation after being on it.