black stain

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toni

black stain

Postby toni » Mon 20 Jun, 2005 22:56

can anyone tell how to know if a stain is black algae or electrolysis

stain is on the floor of the pool around the return assembly attached with 16 stainless steel screws

it does not appear to be a plant it is definately a stain


Guest

Postby Guest » Mon 19 Sep, 2005 12:28

can anyone tell how to know if a stain is black algae or electrolysis ...


put some ph decreaser (powdered) in a tube sock, tie it to a brush pole and place it directly on the stain for a few minutes, then swish it around on the stain...If the stain dissappears,it's mineral. If not, it's algae.

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