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Troubleshooting Cloudy, Foamy, or Discolored Hot Tub Water

Cloudy, foamy, or discolored water in your hot tub can be a nuisance, but with a few simple steps, you can keep your spa water crystal clear. Here's a concise guide to address common hot tub water issues:

Cloudy Water:

  • Check your filter and clean or replace it if necessary.
  • Consider using a water clarifier or shock oxidizer to neutralize waste and bacteria.
  • Ensure proper sanitizer levels and adjust filtration cycles accordingly.

Foamy Water:

  • Test and balance your water, then add shock oxidizer.
  • Address excess phosphates or hard water issues with appropriate treatments.
  • Use a defoamer to tackle persistent foam.

Green Water:

  • Add sanitizer to combat algae growth and use shock oxidizer to remove dead algae.
  • For neglected spas, drain, clean, and refill according to your manual.

pH Imbalance:

  • Test and balance total alkalinity and hardness.
  • Adjust pH levels and sanitizer accordingly for stable water chemistry.

Metal Stains:

  • Use a metal and stain remover as directed.
  • Consider water testing for further recommendations from your dealer.

Sanitizer Issues:

  • Adjust sanitizer levels as needed and circulate water properly.
  • If sanitizer levels are too high, ventilate and dilute the water accordingly.

Scum Line:

  • Increase filtration cycles and use a glove sponge to clean scum lines.
  • Consider preventative maintenance products to minimize organic buildup.


  • Address hard water issues with proper filtration and refilling methods.
  • Dilute excess calcium if needed to prevent scaling.

Yellow Water:

  • Test and balance water chemistry, focusing on total alkalinity.

Local Assistance:

  • Consult Hot Tub Republic for personalized advice and tested water care products.

Keeping your hot tub water clean and clear is simple with the right maintenance routine and expert guidance from your local dealer.