X20 Blue Tetra Packagex20 BLUE TETRA LIVE FRESH WATER FISH FREE SHIPPING *This package contains 20 Fish Approx 1 2" 1 1 2" Each Feeding Your Fish: Be careful not to overfeed your fish! Any food the fish does not eat will pollute the tank. Experts suggest feeding your fish relatively small amounts of food once or twice a day. If they eat all of the food within a few minutes, it is okay to add a bit more, as long as they eat all (or at least most) of it within a short period