Phone Number

(281) 252-6337

Email Address


Magnolia, TX

32403 FM 2978 Suite 118,
Magnolia, TX 77354

Yellow algae, also referred to as mustard algae, is a less common issue that arises in your pool. While you may feel relieved a little to know that its prevalence is less, unfortunately, it is persistent.

Your pool is a safe place to gather and have fun during scorching summers. Finding yellow algae growing in it can be quite unsettling.

There are a lot of health hazards connected to this. Before your pool turns into no less than a nightmare, let’s first grasp what it is, then we will move on to the reason for their appearance with methods to eradicate them.

What is Yellow/Mustard Algae Present in a Pool?

A yellow or mustard algae is a type of green algae resistant to chlorine or any other sanitizer used in a pool. Although the two algae are similar, there is a major difference between them.
Green algae easily float on the surface. On the other hand, yellow algae sticks to the sides of the pool like walls, floor, or any other object such as ladders or filters.

Due to its sensitization to cleaners and sanitizing agents, getting rid of mustard algae in the pool becomes a difficult task. It is a recurrent problem that needs to be dealt with as soon as it comes back.


Mostly, mustard algae is found in places where the temperatures are warm, but nonetheless it can grow in every kind of pool.

Alkalinity, messed up pH can lead to the accumulation of debris and increased phosphate levels, all contributing to their growth.

Prevention of Yellow Algae Growth in Pools

Since mustard algae is recurrent, it is best to practice prevention rather than spending chunks on getting it cleaned. Here are a few pointers to keep in check for the maintenance of the pool.

  • Routinely test your water and keep its chemical balance in check.
  • Always run your pump and filter for at least twelve hours each day.
  • Brush and vacuum your pool regularly.
  • Use good quality sanitizers along with an apt amount of chlorine.
  • Give your pool a shock every week throughout summer.
  • Clean the pool surface regularly.

5 Easy Steps to Kill Yellow Algae in Your Swimming Pool

If you still end up with mustard algae in your pool, do not worry. Follow these steps to get rid of yellow algae from your swimming pool easily.

  1. Remove everything from your pool. Leave nothing but the cleaning equipment behind, wash the pool toys using chlorine or chlorine based cleaners. Make sure to wash the swimming suit as well.
  2. Brush the algae off and vacuum it in waste mode.
  3. Balance the chemicals. Set alkalinity between 60 to 120ppm and pH range 7.2 to 7.4.
  4. Shock the pool with chlorine, brush out the algae and run the pump for 12 to 24 hours at least.
  5. Clean the filter, vacuum, and add algaecide.

Yellow algae are very hard to get rid of; once you detect them, promptly start the removal. It poses serious health risks and should not be taken lightly. Some of which include skin rashes, itchy sensations, and skin breaks. Moreover, ingestion of contaminated water will result in diarrhea, fever, and other problems associated with an infection.

Contact Us

Cleaning your pool after yellow algae manifestation can be a task. Do not worry; Town and Country Pools situated in two different locations, Magnolia and Montgomery have multiple professionals ready to serve you. We offer basic maintenance to full blown construction of the pool. Leave all your troubles aside and call us at 281-252-6337 for more information today.

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