This Standard validates the calibration of the HI 713 Phosphate Checker HC Colorimeter.
(2)Standards (1) 0.00 and (1) 1.00 ppm phosphate
Liquid Reagents for Alkalinity Checker HC Liquid Reagents for 25 Alkalinity Tests
Thanks for all your help and support. As I said before, your kind of customer support will have me returning time and time again for all my marine needs! Let me know when you head to Hawaii!