Green algae on coping grout

tcarter5

New member
Apr 21, 2025
1
shreveport, la
What is the best way to clean a green substance off the grout below the coping and above the tile? The grout line is several inches above the water line so it is usually dry but has a green algae like substance in a several areas.

I’m new to tfp and have been following tfp method for a couple of months. Water chemistry is all within range.

I know the plaster is beyond its useful life. I will be replastering the pool this winter.
 

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Welcome to TFP.

Brush the areas using a stiff brush and diluted chlorine solution. It will probably take multiple applications to get it clear.