YYCGUY's Red Sea 500S

[yycguy]

Need some help on my Low Ph 7.9-8.1
First off I am dosing with a Profilux DkH and Ca using Randy's Recipe 1.
Now my alkalinity has been between 8-9 that is with dosing around 218 ml of DkH a day (9 ml - 24 times a day) First question is that a lot?
All my other parameters are ok, other than I think I stripped the P04 a little to quick, it's 0

Salinity 1.025
Temp 78-79
Ca 420 - 450
Mag 1400
Nitrates 0

I did try dosing more but ended up calcifying my pumps.
With the higher dose I was getting a ph up around 8.2.
So what am I missing?
Salt is Reef Crystals