Phosphates

Phosphates are a type of chemical compound that can be found in spa water and can contribute to algae growth in the spa. They can enter the spa from a variety of sources, including rainwater, runoff, and some spa chemicals.

Phosphates in spa water can provide a food source for algae, which can quickly multiply and create a green, cloudy appearance in the water. Controlling phosphate levels in spa water is therefore an important part of maintaining proper water quality and preventing algae growth. The recommended phosphate level for pool water is typically less than 100 ppb (parts per billion), although this can vary depending on the specific spa and its location.

There are several methods for reducing phosphate levels in spa water, including using specialized spa chemicals and enzymes, adding flocculants to help filter out the phosphates, and physically removing debris from the water through skimming and vacuuming.

While phosphates are not directly harmful to bathers, their presence in spa water can lead to the growth of algae, which can cause health risks and make the spa unusable. Controlling phosphate levels in spa water is therefore an important part of maintaining a safe and enjoyable spa environment.