●MUST HAVE FOR ALL AQUARIUMS - Protect your fish by ensuring their environment is free of any harmful chemicals. ●FAST AND EASY - Test Ammonia in just 30 seconds. Simply dip and read! ●ACCURATE TESTING - Test Ammonia with Lab Grade Accuracy! ●FOR FRESHWATER AND SALTWATER - Advatec Ammonia Test Strips can be used to test Fresh and Saltwater aquariums, Tanks, Fishbowls, as well as Ponds. ●SATISFACTION - If you are not 100% satisfied, simply return the product within 30 days of delivery for a complete refund.