Millard Borax

Appears to be.

Why do you need it? Your pH is fine. Watch your TA. You might bump that up to 70 ppm with baking soda. pH will rise naturally.
 
Tonight's readings:
FAC 9
CC 0.5
pH 7.2
TA 50
CH 90
I ran out of R0013 for CYA so awaiting a refill. The pool is clear as a bell. I'll get some baking soda - 1.5 kg or about 3 lbs. Do I just scatter it or mix with water and add it to the skimmer or to deep end return area? I've also read that I could turn the step returns to the surface to aerate
 
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