I think that reagent will work for you. I copied from BRS Q&A below:
So, is there a difference in the reagents used for the HI755 (PPM) and the HI772 (DKH) checkers? Part numbers on the reagents are different. Thanks.
Question by: Gary on Dec 19, 2017 6:32:00 AM
Thanks for reaching out to us!
The HI755-26 reagent is actually going to be taken off the website very soon. Reagent HI772-26 will work for both dKH and ppm alkalinity Hanna Checkers.
Have a great day.
Answer by: Josh Cuta (Admin) on Dec 21, 2017 2:57:00 PM