This is a pool water treatment from Arm & Hammer. Tablets rather than loose powder, so the dose is fixed and there is nothing to measure.
It earns its place in keeping pool water balanced between full chemical tests. Compare it on how long it lasts rather than on what it costs the first time — that is usually where the difference shows up.
Arm & Hammer is a Church & Dwight brand; the company runs US plants at Green River, Wyoming and Old Fort, Ohio for baking soda, and at York, Pennsylvania and Victorville, California for laundry and cat litter.
