The Tetra Vacation Tropical Slow-Release Feeder will ensure your fish are well fed when you're away on vacation. The innovative gel feeder contains no plaster and will feed up to 14 days without dissolving. Blending with Tetra's patented ProCare, the slow-release feeder provides real nutrition to with health enhancing ProCare ingredients. The Tetra Vacation Tropical Slow-Release Feeder will not pollute water or negatively effect the water quality and can be left in the aquarium when regular feeding is resumed.