Aquarium Water Tests & Kits

API® TEST TUBES are compatible with any aquarium or pond water test kits and are perfect for testing more water parameters at one time. Option of o...

The API® Saltwater Master Test Kit measures the 4 most important saltwater parameters – pH, ammonia, nitrite, and nitrate – to enable easy testing ...

Fluval Sea Hydrometer provides an accurate and convenient method of measuring specific gravity and salt level in marine aquariums. Regular testing ...

CO2 Indicator Solution for use with CO2 Indicators / Drop Checkers. 10ml.

pH is the measure of acidity of water.  A pH reading of 7.0 is neutral.  A pH higher than 7.0 is alkaline, and a pH lower than 7.0 is acidic.  Main...

Calcium is one of the most important elements in a reef aquarium. Reef invertebrates such as corals, crustaceans, mollusks and even some types of e...

For quick, reliable readings in your saltwater aquarium. Submerge hydrometer approximately 15cm below the water line. If necessary, gently tap hydr...

Copper, a common treatment for many parasitic infections, must be monitored in an aquarium or a pond. The copper level can drop too low for the tre...

Nitrite is produced in the aquarium in the forms of fish waste, uneaten food, and by nitrifying bacteria in your aquarium’s natural cycle as it bre...

Regular testing and maintenance of water parameters are important for the health of fish and plants. Aqua One test kits make it easy to balance a r...

Nitrite is toxic and should be undetectable in any well established aquarium. During cycling, it may exceed 20 mg/L. Nitrate is relatively non-...

Regular testing and maintenance of water parameters are important for the health of fish, plants and coral. Aqua One test kits make it easy to bala...

Aqua One QuickDrop pH Indicator Solution is a replacement bottle to be used with the Quick Drop pH test kit.Regular testing and maintenance of wate...

Keep the water quality in your aquarium at optimum levels with new Aqua One Quick Drop Senior pH Test Kit.Regular testing and maintenance of water ...

Pre-measured refractometer calibration solution takes the guesswork out of properly calibrating your instrument - with no need for expensive or unr...

Aqua One has your CO2 requirements covered with the Nano CO2 Set. The set comes with everything you need to boost aquatic plant growth! Carbon diox...

Dymax PH Buffer 7.0 is a certified traceable to NIST standard reference material for PH meter calibration.