What does yellow/mustard algae look like?

Yellow/Mustard Algae looks like mustard colored growth along the walls and in the shady areas of the pool. It's light, soft and slightly slimy to the touch.

Example of mustard algae growing in pool

We recommend using Yellow Treat.

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• What does black algae look like?

  Black Algae looks like small bluish-green to almost black nodules growing on the surface where circulation is low.  Example of black algae growing on plaster We recommend using Swamp Treat.

• What does green algae look like?

  Green Algae looks like green growth usually along the walls and areas with low circulation. They feel soft and sometimes a bit slimy.  Example of green inground pool Example of green algae growing in above ground pool. We recommend using Green Treat. ...

• How do I get rid of Yellow/Mustard algae?

  For yellow/mustard algae, we recommend Yellow Treat. Simply add 5 ounces (one bag or one capful) per 10,000 gallons, brush, then shock the pool. You can find more information in the Directions tab on the product page.

• Can I swim in a pool with yellow/mustard algae?

  In general, yes: it is safe to swim with mustard algae.

• What does pink algae/bacteria/slime look like?

  Pink Algae/Bacteria/Slime looks like reddish pink jelly-like slime growing around fixtures and the bottom of the walls.  Example of pink bacteria growing along wall transition. We recommend using Pink Treat.