SeaTest Ca - Saltwater Calcium is one of the most important elements in a marine aquarium because many corals, other...

SeaTest KH -  Saltwater Bicarbonates (KH) buffer the water against pH changes. But via biological processes in the water the...

SeaTest Mg - Saltwater Magnesium is the third most important element in the composition of seawater. It is essential to...

SeaTest PO4 - Freshwater and Saltwater Phosphate is an end product from the degradation of organic substances such as uneaten...

SeaTest NO3 - Freshwater and Saltwater Uneaten food, fish waste and other organic nitrogen containing compounds are broken down by...

SeaTest pH - Freshwater and Saltwater The pH value is one of the key values of an aquarium or pond....

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

SeaTest NH4 Ammonia (NH3) and ammonium (NH4+) are substances which should be converted rapidly into nitrite followed by nitrate, called...

SeaTest GH - Freshwater The total hardness or GH value indicates the amount of dissolved magnesium and calcium salts in...