Freeze Dried Tubifex Worms - SF Bay Brand All natural, no colors are preservatives added Excellent for finicky freshwater fish Use as supplement or treat Freshwater Fish: Cichlids, Discus, Angels, Kribensis, Rams, Platys, Gouramis, Tetras, Barbs, Cory Cats... Press cube against front glass below the water at desired feeding level. Enjoy watching your fish feast. Feed twice daily, but only what your fish will consume in 3 minutes. Remove any uneaten food.