TDS - Total Dissolved Solids - may be the most misunderstood factor in the whole field of pool & spa water chemistry.   It is misunderstood because no one knows exactly what effect it is going to have on any particular body of water.  Read More

Phosphates are salts of phosphoric acid. Phosphoric Acid (H3P04) is the acid produced when phosphorus is dissolved in water. Phosphates, which contain phosphorus, are plant nutrients that can also be a pollutant. Phosphates in water contribute to algae blooms in the same way nitrates do. In fact, phosphorus is often the "missing ingredient" limiting the growth of algae. Read More