Algae that won’t quit is usually trying to tell you something, and a lot of the time that “something” is phosphates. We dig into the real role phosphates play in pool water chemistry, why they’re measured in parts per billion, and why they don’t simply disappear through evaporation or time. If you’ve ever had a pool that looks balanced but still blooms, or you watch chlorine vanish day after day, this conversation gives you a clean, practical way to diagnose what’s happening. We break down t...