Basics & Nutrients (pH, NH3, NO2, NO3, PO4)

API® 5-IN-1 TEST STRIPS are the quick and easy way to test the 5 most important aquarium water parameters – pH, KH, GH, nitrate, and nitrite – in o...

What is ammonia?Most ammonia generated in an aquarium is the result of the digestion of proteins by fish and other aquarium animals. Ammonia can al...

Ammonium is the product of nitrogen mineralisation in which bonded nitrogen from food remains and excrement is converted to NH4+ by bacteria. Depen...

Red Sea’s Ammonia Test Kit is a complete and easy to use kit for the accurate testing of ammonia, one of the most important parameters in any marin...

The API High Range pH Test Kit measures pH changes in marine aquariums, aquariums with African Cichlids, and very alkaline tap water. The API® High...

SeaTest pH The pH value is one of the key values of an aquarium or pond. The pH value indicates whether the water is acidic or alkaline.  Most fish...

Nitrate ions (NO3–) are formed from ammonium (NH4+) as the end product of the nitrification process. Nitrite (NO2–), which is highly toxic to fresh...

Red Sea’s highly accurate colorimetric comparator test reagent for the measurement of Nitrate in all marine systems.To be used with the Nitrate Pro...

AF Nitrate TestPro is designed for quick measurement of nitrate ions in marine aquariums. Nitrate in water is the end result of biological filtrati...

The API Aquarium pH Test Strips are a quick and simple way to monitor the pH level of your aquarium.Simply pop the strip into the tank and compare ...

SeaTest NO3Uneaten food, fish waste and other organic nitrogen containing compounds are broken down by bacteria into ammonia and in a further step ...

SeaTest NO2 Uneaten food, fish waste and other organic nitrogen containing compounds are broken down by bacteria into ammonia and in a further step...

What is KH?KH, or carbonate hardness, describes the pH buffering capability of water. Water with the correct KH will resist changes to the pH, ensu...

What is nitrate?Nitrate is the waste product of naturally occurring bacteria (Nitrospira spp.) turning nitrite into relatively non-toxic nitrate. I...

Red Sea’s pH/Alkalinity Test Kit is a complete and easy to use kit for the accurate testing of both pH and Alkalinity (dKH) in the marine aquarium,...