How to clear mustard algae

Mustard algae typically occurs in warmer climates, but can also grow in Rochester as well. It often is confused for sand, or dirt because it isn't slimy like green algae. The challenge with mustard algae is that it is chlorine resistant and every item that has been in the pool has to be thoroughly cleaned.

The process to get rid of this type of algae is as follows:

  1. Disinfect and clean all the items that has been in the pool, including floats, bathings suits, and toys, and pool equipment. A cleaner with bleach will work for the toys and floats.
  2. Vacuum the pool to waste with the garden hose running to add water back into the pool. It often is best to start with the water level above the skimmer
  3. Brush the entire pool surface, including walls and steps.
  4. Shock the pool with a heavy treatment, i.e. 3-4 times the typical shock treatment. Shocking the pool is most effective at night.
  5. Make sure that the water in the pool is balanced, including pH and alkalinity
  6. Finally treat with an algaecide. We recommend Banish or Algae Complete from Bio-Guard