Ok, I ran the Reefbot Salifert alk 2 more times. First time it gave me 2.20 dkH. Then I thought maybe these results were due to not completely filling up the reefbot reagent vials. I was using an already opened kit, so the reagents were not full. I emptied a new salifert alk kit into the vial (which BTW, the Alk Ind reagent still does not fill). Ran the test again and low and behold:
Reefbot Salifert alk: 8.3 dKH
matching my manual Hanna and Salifert alk tests.
I need to look into how to set the reagent volume. The only option I saw was to reset it (to 20 ml), but no way to manually adjust it.
Also mine did not come with any reagent vial stickers. Is it supposed to?