For 50 years, fishkeeping enthusiasts have looked to the Tetra name for products and solutions that add ease and beauty to their home. Whether you're an experienced hobbyist or just starting out, Tetra has everything you need–-from a large variety of quality fish food and innovative equipment to test kits and decor. Tetrafauna ReptoGuard Turtle Health Conditioner prevents the spread of salmonella from your turtle. ReptoGuard helps to control common diseases of aquatic turtles, amphibians and other reptiles! Time-release sulfa block helps to control a variety of disease-causing organisms, including salmonella, for the safety of pets and owners. Each turtle shaped block treats up to 20 gallons. Blocks will slowly dissolve releasing the active ingredients. On average, each block will last 45-60 days. Keep out of reach of children. This product is for animal use only. This product is not for human consumption or for animals used for human consumption.