The pH level of hot tub water can cause hot tub foam. The pH level should be kept between 7.2 and 7.8. If you notice your hot tub getting foamy, consider lowering the pH level by adding a pH decreaser, also referred to as Dry Acid. Never use Muriatic Acid to balance off the Ph factor in an acrylic hot tub.
You may find that your hot tub PH level is too low. In this case, you will need to increase it by adding soda ash or baking soda. We recommend sodium bicarbonate as it allows for more of a gradual increase. Soda ash causes PH levels to rise quickly and is better for pools.
Proper water chemistry is a vital part of keeping your hot tub water healthy and foam-free. You should test your water a least once a week to make sure that your tub water is balanced.
It is best to speak to your spa dealer before using any products in your hot tub. They will be able to assist you in the best products for treating your brand of hot tub.