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
I received the order today (3 kits of Nitrate and 3 kits of Ammonia). Thanks you for such prompt service. It was GREAT!!