Ever walked up to a pool or spa and thought, “What is that gross film on the water—and why is it foaming like a bubble bath?” In this episode, I’m diving into the sticky truth behind scum lines and foam. I’ll break down what causes them, how to fix them, and most importantly—how to prevent them from showing up in the first place. Whether you’re a pool tech or just trying to keep your spa guest-ready, this one’s packed with practical advice and a few stories from the field.

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