I feed my guppies and goldfish and rainbows ripped up veggies all the time. They like it.Hmm. I will have to try this with some of the old crap in the fridge. I accidentally bought too much and I'd hate to throw it out. I have some freezer burned broccoli and zucchinis I threw in there too. Haha. I'm sure the guppies and tinfoil will be happy.