How Can I Get Rid of Mustard Algae in My Pool?

Aptly named due to its resemblance to the common hot dog condiment, mustard algae is a type of pool algae that can resemble sand, dirt or stains. While typical of warmer locales, it can pop up in any climate if the conditions are right. However, you have to act quickly and remove it before it has a chance to spread.
Also known as yellow algae, mustard algae isn’t slimy like its more common counterpart, green algae. It is pretty aggressive, though, and will proliferate on pool walls, floors, accessories, outside the pool itself, as well as bathing suits, floats, tubes, and toys. Disinfect and wash those items, or throw them out if they are inexpensive. Buy new ones. Anything you can’t throw out, put them in the shallow end of the pool together for disinfecting. The thing about mustard algae is, it’s resistant to chlorine so you need to triple shock your pool for the most effect.

Mustard Algae Tips

Here are some tips to ridding your pool of mustard algae:

  1. As said above, gather all equipment into the shallow end, such as poles, hoses and other maintenance equipment. This will make it easier to sanitize them when you shock the pool.
  2. Vacuum the algae: Connect your manual vacuum cleaner and switch the filter to waste, not backwash. This is to keep the algae from getting into your filter and taking hold. Fill the water to the top to make up for any water lost through the process.
  3. Test the water via test strips from the pool store. Look for pH levels between 7.4 and 7.6, with alkalinity between 120 and 150 ppm (parts per million). This will ensure a more effective shock treatment.
  4. Brush the pool to break up the algae and allow the chlorine to properly attack it.
  5. Triple shock the pool for three pounds per 10,000 gallons of water, performing this task at dusk or nighttime. Let your filter and pump run 24/7 until you are certain the algae is eradicated.
  6. Brush the pool again over the next few days.
  7. Re-check the pH and alkalinity levels over the next few days, too.
  8. Take out any toys, floats and equipment you sanitized from the pool.
  9. After the last shock treatment, test the water once again to be sure you got all the mustard algae.

This can definitely be a time consuming, difficult process, and it’s not always fool proof. If you need our help, call Central Jersey Pools. Our technicians can come out and perform the above tasks for you to ensure your mustard algae is gone for good.
 
 

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