Heavy metal stains can be caused by the following:
Heavy metal stains can be easily removed from pool surfaces. The ease of removal is related to how long the stains have been on the surface and how porous the surface is. The newer the stain and the smoother the surface the easier it will be to remove it.
NOTE: DO NOT SUPERCHLORINATE OR SHOCK POOL PRIOR TO OR DURING STAIN REMOVAL TREATMENT!
NOTE: METAL STAINS AGED INTO CONCRETE POOL SURFACES MAY REQUIRE ACID WASHING.
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