API Ammonia test kit API Ammonia test kit  for Freshwater and Seawater The API AMMONIA TEST KIT measures ammonia to help prevent fish loss, as ammonia is the number one stressor and killer of tropical fish. Ammonia is released into an aquarium in the forms of uneaten food, decaying organic...

API Test Tubes API® TEST TUBES are compatible with all aquarium water test kits and are perfect for testing multiple water parameters at once. Package includes 24 glass test tubes with plastic quick-release caps.

API 5-in-1 Tests Strips API 5-in-1 Test Strips API® 5-IN-1 Test Strips are a quick and easy way to monitor the 5 most important aquarium water parameters - pH, KH, GH, nitrate, and nitrite - in one step. Simply dip a test strip...

API Nitrite Test Kit API NITRITE TEST KIT for freshwater and saltwater. Nitrite is produced in the aquarium in the form of fish waste, uneaten food, and by nitrifying bacteria in your aquarium's natural cycle when they break...

API high range PH test kit API HIGH RANGE pH TEST KIT for freshwater and seawater. API High Range pH Test Kit measures pH changes in marine aquariums, African cichlid aquariums and even highly alkaline tap water. The API High Range pH Test Kit measures the pH of...

API Saltwater master test kit API SALTWATER MASTER TEST KIT API SALTWATER MASTER TEST KIT allows you to measure the 4 main seawater parameters - pH, ammonia, nitrite, and nitrate - in order to monitor the natural cycle of the...

API Copper test kit API COPPER TEST KIT for freshwater and saltwater API COPPER TEST KIT allows for easy and accurate monitoring of copper levels from 0 to 4 ppm to maintain copper-based fish treatments at therapeutic levels. The kit measures both free and chelated copper...

API Phosphate test kit API PHOSPHATE TEST KIT for Freshwater and Seawater The API PHOSPHATE TEST KIT makes it very easy to monitor phosphate levels between 0 and 10 ppm in freshwater and seawater aquariums. <Phosphate can be brought into the aquarium by tap water, fish waste and decaying organic...

API Nitrate test kit API NITRATE TEST KIT for freshwater and seawater API NITRATE TEST KIT measures nitrate levels 0-160 ppm in freshwater or seawater aquariums. High nitrate levels in an aquarium indicate an accumulation of...

API Reef master test kit API REEF MASTER TEST KIT API REEF MASTER TEST KIT allows you to measure the 4 key parameters - calcium, carbonate hardness, phosphate, and nitrate - to keep reef populations healthy. The tests are...

API KH TEST KIT API KH TEST KIT for freshwater and seawater The API KH TEST KIT tests the carbonate hardness (KH) of water in freshwater or seawater aquariums. It helps to control water quality and prevent unnoticeable water problems that can be harmful to fish and plants....

API Calcium test kit API CALCIUM TEST KIT for Seawater API CALCIUM TEST KIT measures calcium levels down to 20 mg/L to help you keep your reef population healthy. <Calcium is one of the most important elements in a reef aquarium. Invertebrates, such as corals, crustaceans,...