1 IN Ceramic Skid Resistant Tile Depth Marker 6 Inch x 6 Inch with 4 Inch Lettering pool-size_75000-99999 A pool's pH levels should

A pool's pH levels should be maintained between 7

it has an automatic timer shut-off and air sensor

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1 IN Ceramic Skid Resistant Tile Depth Marker 6 Inch x 6 Inch with 4 Inch Lettering pool-size_75000-99999 A pool's pH levels shouldThis ceramic pool depth marker is printed with 1 IN and has a skid resistant surface. It's overall size is 6 Inch x 6 Inch and has a letter height of 4 Inches This ceramic pool tile is printed with ceramic glaze inks, then kiln fired to ensure the finest, most durable depth and safety marker line available. The skid resistant tile is surfaced in the factory, not sanded or coated, for a more reliable slip resistant surface! Skid resistant tiles are for