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
You were a big part in helping us setup our aquarium and I wanted to thank you for all the time and effort you've put into making our system a success. Thankx a million.