What to Do If Your Hot Tub Water is Cloudy, Foamy, or Green?

What to Do If Your Hot Tub Water is Cloudy, Foamy, or Green?

Dipping into a hot tub can be the pinnacle of relaxation. But what happens when the water in your hot tub is cloudy, foamy, or green? Fear not! We've got you covered. Discover the causes and solutions to common hot tub water issues.

The Green Water Mystery

Why does it turn green? 

The primary culprit behind green water is algae, signifying that the chlorine or bromine levels in your hot tub aren't adequate. Additionally, metals like iron, copper, and manganese from sources like copper pipes or corrosion can tint the water green. Even some tanning products can interact with hot tub chemicals, leading to a green or brown tint on the internal components. 


For water that's turned green within 24 hours, consider the following: 

  • Removing the cover and pillows. 
  • Adding 60g of sanitizer for every 1,500 liters of water. 
  • Turn on the jets for a complete cycle. 

If the water still hasn't cleared or it's been green for more than a day: 

  • Drain and thoroughly clean the tub. 
  • Refresh with clean water. 
  • Ensure filters are clean and balance the pH after the hot tub reaches around 38°C.

The Cloudy Conundrum

What causes cloudiness? 

Over time, hot tub water can become cloudy due to age, even with regular chemical treatment. Other reasons include the following: 

  • Low sanitizer levels. 
  • Imbalanced pH levels lead to limescale. 
  • Dirty or outdated filters. 
  • External contaminants like washing powder residues or lotions. 


Start by: 

  • Testing and adjusting chemical levels. 
  • Deep cleaning or replacing filters. 
  • Draining and refilling the hot tub if all else fails.

The Foamy Fiasco

Why the foam? 

Common contaminants causing foam include: 

  • Residues from hair products. 
  • Cosmetics like deodorants and moisturizers. 
  • Washing powders from the swimwear. 
  • Cheap or diluted chemicals. 
  • Accidental drink spillages. 
  • High TDS (total dissolved solids) levels. 


First, test for chemical imbalances. If needed: 

  • Restore balance using your usual chemicals. 
  • Try a no-foam product to tackle pollutants. 
  • Replace the water if the issue stems from high TDS. 

Preventing Hot Tub Foaming 

Simple measures can drastically reduce foam: 

  • Shower before entering the tub. 
  • Secure long hair to minimize residues in the water. 
  • Rinse swimwear to remove detergent residues. 
  • Use trusted, high-quality chemicals for maintenance. 
  • A Spa Caddy Table can be a savior for preventing drink spillages. 


Maintaining a clear and ready-to-use hot tub is all about diligence. Monitor for unusual changes, keep it covered when not used, and stick to a maintenance schedule. With these steps, your hot tub will always beckon you for a relaxing soak. Happy tubbing!