9 1/2 FT Ceramic Smooth Tile Depth Marker 6 Inch x 6 Inch with 4 Inch Lettering YGroup_aluminum-signs It is used for hydorgen

It is used for hydorgen peroxide test with Taylor Kits - instructions #5312

For permanent installation in the return line

Say goodbye to hand vacuuming and routine cleaning chores

This is Rola-Chem's Pro Series 300 RC307MC Peristaltic Pump with a maximum feed rate of 77 GPD at 30 PSI

9 1/2 FT Ceramic Smooth Tile Depth Marker 6 Inch x 6 Inch with 4 Inch Lettering YGroup_aluminum-signs It is used for hydorgenThis ceramic pool depth marker is printed with 9 1 2 FT and has a smooth 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 smooth surface tiles are for waterline applications. Please note the FT is not 4 inches, but is as pictured. Ceramic depth markers are essential