Do you have a few seconds? If so, you have time to use the advanced AquaChek 6-in-1 Test Strips for Spas and Hot Tubs. Just 15 seconds will give you amazingly accurate results and readings on six spa parameters, which include total chlorine, total bromine, free chlorine, total alkalinity, pH and water hardness. These readings will let you know when it’s time to shock your water, the perfect level needed for crystal clear water, and you’ll know if your hot tub is undergoing any rapid pH changes which can lead to scale formation and corrosion. Finally, by checking hardness levels on a regular basis you’ll avoid foaming, cloudiness and scale formation.