My fish didn't like the frozen, maybe cause I never boiled them :roll: . No need to boil if you use canned, I have luck with (must be unsalted) canned green beans, unsalted canned peas if I separate the insides from the shell, and fresh zucchini cut in half or in pieces and rubber banded to a rock. I've put in whole halfs of zucchini and there is never anything left over except skin, you can leave it in there for a day or two and its fine. Other then this I feed all my fish NLS cichlid pellet 1mm, 3mm, and also spirulina flakes. GL