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How to Fix a Cloudy Hot Tub

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Having cloudy hot tub water is a common problem. We’ll learn what causes the water to be hazy and then demonstrate some simple remedies.

What Causes Cloudy Hot Tub Water?

Causes include:

These are common causes of cloudy water in a hot tub, and unlike a pool, a hot tub can become cloudy quicker because of its small size. You’re dealing with a lot less water than a swimming pool.

How to Fix a Cloudy Hot Tub

3 Cures For Cloudy Hot Tub Water

Depending on your situation, you can use any of these techniques for getting rid of the cloudy, hazy water. If the water in your hot tub is less than 2 months old, then I suggest doing the following…

1. Test Your Hot Tub and Shock It

Before you shock the tub, you need to know what the levels of the chemicals in your water are.

If your water is properly balanced, then you can shock the water depending on the type of sanitizer you use.

[NOTE: When adding any chemicals to your water, be sure the hot tub is running but the air valves (the bubbles) are turned off.]

For chlorine or mineral sanitized hot tubs, use powdered chlorine and non-chlorine shock. For a 500 gallon hot tub, you would use 3 teaspoons of concentrated, powder chlorine or 2 ounces of non-chlorine shock (potassium peroxymonosulfate). Then let it run for about 20 minutes with the hot tub cover off.

For bromine sanitized hot tubs, use powdered bromine and non-chlorine shock. For a 500 gallon hot tub, you would use 2 1/2 ounces of powdered bromine or 2 ounces of non-chlorine shock (potassium peroxymonosulfate). Let it run for about 20 minutes with the hot tub cover off.

For BaquaSpa or biguanide sanitized hot tubs, use the same brand of shock designed for your chemical system. The dosages may be different depending on which brand you use.

2. Use A Hot Tub Water Clarifier

When choosing a spa water clarifier, make sure the chemical is designed for hot tubs. DO NOT use a water clarifier for a swimming pool. Follow the direction on the back of the bottle when adding clarifier.

3. Drain and Refill

The beauty of owning a hot tub is the ability to easily drain and refill if you have a problem. I would recommend taking this route if you water is more than 2 months old.

If you use the hot tub quite a bit, you will need to change out the water frequently. Just think of it like a bathtub in your house. Would you just fill it up once and keep using the same water over and over again? No! That would be totally gross. Change the water in your hot tub!

Happy Soaking!

Recommended Reading

How To Prevent and Remove Oily Scum on Hot Tub Water
Do you have oily scum on hot tub water? If so check out how you can remove it and then prevent that scum from ever returning.
How to Get Rid of Algae in a Hot Tub
Algae in a hot tub is very easy to cure. The first, and most effective way, to get rid of algae is by draining the hot tub. I'll show you in this tutorial.
How to Remove and Prevent White Flakes in a Hot Tub
Do you have white flakes in a hot tub? If so then you need to learn what they are, their causes and how to get rid of them once and for all.
How to Prevent and Remove Hot Tub Stains
Let’s examine the most common stains and what you need to do to clean them so you and your guests can enjoy a clean and clear hot tub.
The Hot Tub Handbook

Master Hot Tub Water Chemistry Once and For All!

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Last Updated: Sunday, July 28th, 2013