5 Steps to Safely Fix Hard Pool Water

Drain only 25-30% of the pool at a time Draining more risks floating the pool or damaging plaster, liner, or fiberglass. For vinyl or fiberglass pools, never drain more than halfway unless the manufacturer approves.

Refill with fresh, soft water No chemical treatment removes dissolved calcium and magnesium. Dilution is the only real solution.

Wait a day before testing Let the water mix completely, then test hardness. Repeat the drain-and-refill cycle until levels drop below 400 ppm. Ideal range is 200-300 ppm.

Check local ordinances before draining Many areas require discharge into a sewer or dry well, not the street or storm drain. Ignoring this can lead to fines.

Turn off the pump before water drops below the skimmer Running the pump dry destroys it quickly. Always shut it off before draining.