Potential issues causing excessive foam basically break down into two categories – those issues related to normal use and foreign chemicals in our spa.
Foam may begin to appear as the time since your last drain and fill lengthens. Chemicals you have added to your spa water, to keep it free of pathogens and adjust your pH, begin to build up in your spa water. Generically this is referred to as TDS (Total Dissolved Solids). In this case, foam is simply an indication that its time to drain your spa and refill with fresh water.
