How do I get rid of mustard algae?

Mustard algae is very fine and is a yellow (mustard-coloured) powder that is very volatile.

It is found at the bottom of pools or on pool walls and comes off easily when you scrub it with a brush (broom or robot), although this creates a cloud of algae…

The easiest way to destroy it once and for all as is follows:

• Remove scale from the filter in order to get most of it out: Use Acti Filter Cleaner
• Lower the pH to around 7.0: Use Acti pH Minus Powder
• Carry out shock treatment: Use Acti TOP or Acti HP Granules
• Use Acti Anti-Mustard Algae
• Scrub with a brush and filter for 48 hours
• If you have a sand filter, use Acti Flocculent Sock