Need some advice. Kalk pump died and now pH and Alk very low

[kc350twin]

Hey Fellow Reefers I am in need of advice. Late last week my Litermeter decided to stop dosing Kalk.
I dose Kalk at full saturation from a vat separate from my ATO. Since about Friday I noticed my pH slowly getting lower and just could not put it together that the Kalk wasn't being dosed. I have since fixed the issue with the LiterMeter and Kalk is now being dosed at the original 1.70L per day that I normally had been doing but the pH and ALK just keep on dropping. It is currently at 6.88 and Alk at 7.0. My normal ranges are 8.2-8.0pH and 8.0 Alk. Calibrated the pH meter on Monday and I do not have a separate pH meter to compare to.

Is this possible to be at 6.88?

Is the rate of pH drop and Alk drop close to what they should be?

If it is in close correlation how would you go about raising it back to normal ranges? Just keep adding Kalk in larger but reasonable doses?


Thanks for the help
KC3

 

[Randy Holmes-Farley]

I don't think there's any chance the pH is 6.88 in the tank. I'd recalibrate, and if you want 8 dKH for alkalinity, I'd give it a one time boost to about that level with baking soda.