When you are operating your hot tub, particularly with the “air” on, a small amount of foam on the surface of the water is normal. However, it should dissipate within 5 – 10 seconds after your stop your jets. If the foam does not dissipate this quickly, and particularly if it continues to build as you use your hot tub, you definitely have a water quality issue(s).
What causes foam in your spa?
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