Poolside Patio Clock - 12 Inch state_Oklahoma It is used for Calcium

It is used for Calcium Hardness testing in Taylor Kits

This Ready-to-Mount pH/ORP Salt Generator Controller System includes: Programmable Digital RC554XP pH/ORP Controller complete with flow cell

1/8 inch thick

This Coin Release Weir has dimensions that can be used on Hayward 5-7/8 inch skim filter boxes

Poolside Patio Clock - 12 Inch state_Oklahoma It is used for CalciumOur 12 inch, weather resistant patio clock features second hand quartz movement and large easy to read numbers. You can use this clock indoors or outdoors. It is constructed of white durable ABS material with a glass lens. The clock does require one AA battery (not included). Many states require that a clock be visible from the spa or pool. This allows your spa patrons to keep their stays to 15 minutes (or the time required by law).