Protect marine fish & invertebrates from unsafe water conditions with api saltwater master test kit. Fish waste, uneaten food, plant refuse & other organic compounds can create harmful levels of ammonia, nitrite & nitrate as well as cause drastic fluctuations in ph. These unhealthy conditions can result in fish stress, gill & tissue damage & even death. The api saltwater master test kit accurately measures these four saltwater parameters that are key to keeping your aquarium healthy. It includes six bottles of liquid test reagent, four glass test tubes with snap-tight caps, a holding tray & a step-by-step instruction booklet with information on how to correct unsafe water conditions. Simply fill a clean test tube with 5 ml of water, add the appropriate test drops & compare results with the color chart. Then follow the recommendations to modify conditions if action is needed. With api aquarium products, it’s easy to keep a beautiful saltwater, freshwater or reef aquarium. For over 50 years, api has been creating innovative, research-driven solutions that make it easier to care for your fish & aquarium. Api aquarium treatment supplies are designed to work in conjunction with each other to provide best results to control algae, promote healthy bacterial growth & help control & cure fish diseases & conditions such as ich & fin rot. They work to provide a safe, hospitable environment for fish such as tropical community fish, cichlids, goldfish & more. With api, you can spend more time admiring your fish, & less time scrubbing your tank. Make sure to use all products as directed in order to ensure the best results.