Lay-Z-Spa Cloudy Water / Poor Filtration

Lay-Z-Spa water appears cloudy or milky even though the pump and heater work normally.

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Possible Causes

Dirty or undersized filter cartridge, High bather load without adequate sanitiser, Imbalanced water chemistry (high pH, high alkalinity), Biofilm buildup in plumbing

How to Fix / Troubleshooting

Safety first: Do not use the spa if water is visibly contaminated or has an unpleasant odor.

  • 1. Replace filters: Install a new Lay‑Z‑Spa filter cartridge and run filtration continuously for several hours.
  • 2. Test and balance water: Use test strips to check pH, alkalinity, and sanitiser (chlorine/bromine) levels. Adjust according to Lay‑Z‑Spa guidelines.
  • 3. Shock the water: Add a spa shock treatment to oxidize organic contaminants, following product dosing instructions.
  • 4. Run filtration: Run the filter pump for extended periods (8–24 hours) until water clears.
  • If water remains cloudy: Drain, clean the liner and plumbing with a spa system flush product, rinse thoroughly, and refill with fresh balanced water.
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Repair Difficulty

Very Easy 1/5

Required Part

Filter Cartridge
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