How To Get Rid Of Yellow Algae In A Hot Tub


One thing that can automatically put you off and not long for an evening soak is a yellowish hot tub!

You are probably experiencing this; cloudy water or a slippery layer, which we guess feels gross on touch! Are you wondering what this is? It’s yellow algae also commonly known as mustard algae that can be in your hot tub for the reason you may or may not be aware of.

You sometimes ignore litter, rock fragments, and sand inside your spa but this could just be the cause of the algae and if not addressed early enough, soon you may find yourself replacing your hot tub.

Even before you clean and prevent the algae from your hot tub, let us go back to the roots and find out what causes yellow hot tub water. Ready?

What Causes Yellow Algae On Your Hot Tub?

You will be shocked because some of these reasons could be the least you expect to be the cause of yellow hot tub water.

  1. Metals present in your water could be one of the major causes of yellow or mustard algae in your hot tub. Some of these metals are rust, manganese, and probably iron. So the big question is, how do they even get into the water? Your hoarse pipe! It carries these metals you’re changing or refilling water in your hot tub.
  2. Imbalanced pH levels in the water. Get your test kit and test the PH of your water. When the pH gets too low it means that your water is too acidic and you need to do something about this. When your pH gets too high, we could probably talk of above 7.6 and that means your water is too basic. Well, this is enough to raise an alarm.
  3. The mention of pH levels in the water brings something else – sanitization! It all depends on the hot tub chemicals you use for the job. If the amount you add into the water is not enough, then soon you will start noticing some yellow algae on your hot tub.
  4. If changing your hot tub water is not on your to-do-list then this could just be the other reason behind yellow hot tub water.
  5. Leaving your hot tub without a cover for a long time. This encourages the growth and multiplication of yellow algae.

You might also like: How To Remove And Prevent Hot Tub Scaling

How To Get Rid Of Yellow Algae In A Hot Tub

Knowing the problem always makes it easier to find a solution. You now know what causes algae in the hot tub, so let’s find out how to get rid of it.

1. Give Your Toys, Floats, And Suit A Thorough Clean Up!


The best way to do this is to machine wash your swimsuit to kill the algae that could have attached themselves to them. Use chlorine to disinfect your toys and floats and avoid detergents at all costs.

2. Shock Your Hot Tub

This is one of the most effective ways of getting rid of yellow algae. When you shock your hot tub, you add a higher amount of chemicals than usual. This destroys even the tiniest of the algae giving your tub back its lost sparkle.

3. Test Your Water Regularly

Testing your water regularly will ensure that you can balance its pH levels. The pH of the water should be between 7.4 and 7.6, if it’s anything more or less than this then, do something! Maintaining a good pH level of your tub ensures maximum effect of spa shocking.

4. Give Your Tub A Nice Brushing

Before you even sanitize, dirt removal comes first! Using an algae brush, scrub the inner part of your tub thoroughly to get rid of any algae that may have accumulated on its walls.

5. Follow A Hot Tub Maintenance Schedule

If you take good care of your spa, you will never have to worry about yellow algae. Make sure to create a hot tub maintenance schedule and stick to it. This way, you will be able to keep track of things and get rid of algae even before it starts blooming.

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They say prevention is better than cure and caring for your tub will prevent a lot of spa issues. Make it your responsibility; keeping it clean and doing your water chemistry right will just be the best way to keep your hot tub away from yellow algae.

Clean everything, yes everything, even whatever you think is not necessary. That could be just where these algae are and will later accumulate on our tub when you use it.

Want to bid goodbye to yellow algae? Shocking your tub should always be a part of you. Do it every week at least once and you will no longer have to feel bad about yellow hot tub water.

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