Curing concrete IS normal to raise pH, but 6-8 weeks is the norm. I don't know about the ozonator, but SWGs push pH up as well.

If you are using THAT much "pH Down" you should be using Muriatic acid instead.
a) It's LOTS cheaper--probably 1/4 to 1/2 what you are paying.
b) It doesn't add anything to your water--no total dissolved solids. It's Hydrochloric acid so mostly it releases a little chlorine into the water.
c) It acts VERY fast.

But you must be careful, wear long clothing, gloves and goggles, and don't breath the fumes. I like to pour it into a 5 gallon bucket of water so it's diluted before it hits the pools--won't damage anything expensive that way. Buckets are cheap.


But