API Nitrite Test Kit - Freshwater/Saltwater 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 and saltwater aquariums. Testing water...

API Ammonia Test Kit - Freshwater/Saltwater Taking a few minutes each week to maintain and monitor aquarium conditions is the key to a healthy aquarium.   Tropical fish continually release ammonia into the aquarium through their...

API Deluxe pH Test & Adjuster Kit  Keep your fish healthy and thriving by testing your aquarium water's pH regularly with easy-to-use API Freshwater Aquarium pH Test Kit. Testing water parameters weekly helps prevent invisible water...