Factors influencing Alk depletion rates?

[reefwars]

Originally Posted by Delphinus

I didn't think to test tank pH last night but it occurs to me now maybe I should. Seems to me something is up. I'm not sure what to look for here. Any thoughts?

ph could be something to conside...are you running a hrv in yor house?? if not could be the sudden change in weather we just got and not as much fresh air entering the house.

other than that i have no idea unless something changed in the way of salt batch or something?? idk