See here for the procedure:
Today We are going to show you how you can get rid of mustard algae in your pool. By following the steps in this guide and with no expensive chemicals.
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The SLAM is completed first, then FC is brought up for 24 hours to mustard shock level, and EVERYTHING is scrubbed down as thoroughly as you possibly can while the water is at that level.
Here's the chart to show the levels to use:
EDIT: You will find a simplified and standardized version of this chart at Pool School, Chlorine / CYA Chart. Chlorine/CYA Chart by Chemgeek FC = Free Chlorine in parts-per-million (ppm) CYA = Cyanuric Acid in parts-per-million (ppm) CYA ........... Min FC3 ..... Target FC ...... Yel/Mstrd...
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