Aqueon 3-Day Fish Food Feeders will keep 5-6 medium-sized tropical fish fed for up to 3 days. Simply drop the feeder into the aquarium to provide optimal nutrition for your fish while you're away on vacation. Each block feeds 5-6 medium tropical fish for up to 3 days Slow-release food pellets provide optimum nutrition High efficiency formula produces less waste Feeding Guide: Determine the correct block size & quantity by the amount of fish and the length of time you'll be away.Note: It is recommended to perform a water change after blocks have been consumed. Oops, this item is out of stock! But don’t worry—our Special Deals section is packed with amazing finds at even better prices. Explore now and score exclusive discounts you won’t want to miss!