feed a large variety (I feed mine 3 types of flakes, 1 type of pellets, veggies, live food, freeze-dried brine shrimp...) and as much as they can eat in 2minutes. The more it eats the more it excretes! And I would be cautious about the (cooked?) fish.. You can give them very small pieces, but I wouldn't do that more than once a month or so (it can foul your water quickly!). But the peas are ok. Variety is the key to colorful fish!!