Liquid Reagents for Alkalinity Checker HC
Liquid Reagents for 25 Alkalinity Tests
This Standard validates the calibration of the HI 713 Phosphate Checker HC Colorimeter.
(2)Standards (1) 0.00 and (1) 1.00 ppm phosphate
I'm a Moderator on a very large Reef board and have been recommending your site to people that are looking for hardware or dry goods for their reefs and your prompt e-mails are quite welcome.