(3 Pack) TetraWeekend Tropical Slow-Release Feeder 1.06-Ounce each Pack of 3 TetraWeekend Tropical Slow-Release Feeder 1.06oz Each Allows fish to eat when hungry vs plaster feeders that dissolve Will not pollute water or negatively effect water quality Gel blocks may be left in the aquarium when regular feeding is resumed Allows fish to eat when hungry vs. plaster feeders that dissolve.