MSPA Water Quality / Sanitation Imbalance

Water in MSPA spa becomes cloudy quickly and has a strong chemical or musty odor.

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Possible Causes

Insufficient sanitizer (chlorine/bromine), Dirty or undersized MSPA filter cartridge, High bather load without shock treatment, Biofilm buildup in plumbing

How to Fix / Troubleshooting

Safety first: Do not use the spa if water is visibly cloudy or smells strongly of mold or chemicals.

  • Test water: Use spa test strips to check sanitizer, pH, and alkalinity. Adjust to MSPA‑recommended ranges.
  • Shock treatment: Add a non‑chlorine or chlorine shock product according to label directions to oxidize contaminants.
  • Clean/replace filter: Rinse the MSPA filter cartridge thoroughly or replace it if older than recommended.
  • Flush plumbing: Periodically use a spa pipe cleaner product to remove biofilm from MSPA plumbing, then drain and refill with fresh water.
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Repair Difficulty

Very Easy 1/5

Required Part

MSPA Filter Cartridge
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