Keep your fish healthy and thriving by testing your aquarium water regularly with easy-to-use API 5-in-1 TEST STRIPS. API 5-in-1 TEST STRIPS for fr...

Ammonia liquid testing kit accurately tests the ammonia level in freshwater and saltwater tanks. Uses an easy-to-read color chart and clear instr...

API BIO-CHEM ZORB SIZE 6 Aquarium Canister Filter Filtration pouch uses superior resins and activated carbon to clean and clear aquarium water, rem...

Keep your aquatic life healthy and thriving by testing your aquarium water's calcium levels regularly with this easy-to-use API CALCIUM TEST KIT fo...

Most water problems are invisible to the eye. Quickly measure and modify the six aquarium levels that are most important to the health of your fres...

API HIGH RANGE pH TEST KIT may be used in fresh or saltwater aquariums to measure pH levels in the range of 7.4-8.8. Unbalanced pH levels, resultin...

Keep your fish healthy and thriving by testing your aquarium water's KH levels regularly with this easy-to-use API CARBONATE TEST KIT for freshwate...

When left uncorrected, high nitrate in aquarium water can lead to water problems invisible to the eye, poor fish health and a build-up of organic p...

Keep your fish healthy and thriving by testing your aquarium water's NO3 levels regularly with this easy-to-use API NITRATE TEST KIT for freshwater...

Keep your fish healthy and thriving by testing your aquarium water's NO2 levels regularly with this easy-to-use API NITRITE TEST KIT for freshwater...

Keep your fish healthy and thriving by testing your aquarium water's pH regularly with easy-to-use API pH TEST KIT for freshwater aquariums. Testin...

Phosphate can enter the aquarium in fish waste, decaying organic matter and tap water. High phosphate in the aquarium can cause water clarity issue...

Keep your fish healthy and thriving by testing your aquarium water's PO4 3- levels regularly with this easy-to-use API PHOSPHATE TEST KIT for fresh...

API POND ACCU-CLEAR Pond Water Clarifier quickly eliminates cloudy pond water caused by dirt, silt and floating particles. This fast-working pond c...

Fast-acting API POND ALGAEFIX Algae Control works to control algae growth in ponds, water gardens, and fountains, keeping water clean and clear. AP...

API POND STRESS COAT Pond Water Conditioner works instantly to remove chlorine, chloramines and ammonia from tap water and neutralize heavy metals....

API POND-ZYME SLUDGE DESTROYER Pond Water Cleaner with Barley reduces build-up of fish waste and consumes pond sludge, which is typically a build-u...

In a new aquarium, harmful ammonia and nitrite build up from fish waste, often resulting in fish loss or “new tank syndrome”. The unique, patented ...

Measure the most important reef aquarium levels including calcium, carbonate hardness (KH), phosphate and nitrate with API REEF MASTER TEST KIT. Pr...

Protect marine fish and invertebrates from unsafe water conditions with API SALTWATER MASTER TEST KIT. Fish waste, uneaten food, plant refuse and o...

Treat your tap water, and provide a safe environment for freshwater fish instantly and easily with API STRESS COAT Freshwater Aquarium Water Condit...

Reduce aquarium maintenance by creating a naturally balanced aquarium with API STRESS ZYME Freshwater and Saltwater Aquarium Cleaning Solution. Fis...

Good water quality is the key to a healthy, beautiful aquarium. Tap water contains chemicals, such as chlorine and chloramines, which make water sa...

API TURTLE SLUDGE DESTROYER Aquarium Cleaner and Sludge Remover Treatment reduces build-up of turtle waste and consumes aquarium/vivarium sludge, w...