100) New AQUACHEK Select Refill Swimming Pool Spa 7 Test Strips pH/Chlorine
Just dip an AquaChek Select 541640 test strip in your pool or spa water for one second and remove it immediately. You get results in seconds! It's a simple, cost-effective way to ensure that the water is safe.  To keep your pool at its best, test at each end at least twice a week, and test your spa before each use. You may also want to write down your results so you can track changes over time.