Water GuideBy Napa Valley Hot Tubs, Here's a guide you can use to determine if your water is balanced:ParametersMinimumIdealMaximumFree Chlorine (ppm)12-410Combined Chlorine (ppm)000.2Total Bromine (ppm)24-610pH7.27.4-7.67.8Total Alkalinity (ppm)6080-100180Calcium hardness (ppm)150200-400500-1000Cyanuric Acid (ppm)1030-50150Total dissolved solids (ppm)n/an/aInitial TDS +1500Recent Articles See All Measuring Your Spa Cover Guide Author:Napa Valley Hot Tubs Posted:December 29, 2023 It is very important that you take the time to measure correctly for your cover. We will make the cover to your specifications. Remember this is YOUR cover! Nearly all spa covers are different depending on personal preferences. Your cover will only be as accurate as your measurements. With that in mind, we've provided you […] Read More