Staff Answer
Jun 02, 2026 - 09:25 AM
Generally, the existing water can be used. However, conversion time is a great time to get a pool store test and look for an accumulation of Cyanuric Acid (CYA), or Stabilizer, and be certain it's not already over 50. In addition, if Total Dissolved Solids (TDS) are too high from years of pool operation it's a good time to refresh the water.

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