Phosphate standards

Low Cost, Easy to use kits for testing a wide range of water quality Parameters Continuous gradient color disks provide accurate measurements—no need to “extrapolate” between discrete color blocks Rotate the color wheel to obtain a color match with t

Low Cost, Easy to use kits for testing a wide range of water quality Parameters Continuous gradient color disks provide accurate measurements—no need to “extrapolate” between discrete color blocks Rotate the color wheel to obtain a color match with t