When we used to use the pucks, it would be nothing for me to go thru 60 pounds of PH Increaser each season. Sometimes more!

Since we've gone BBB this year with fresh water (got a new liner right before closing last fall) I only added borax first thing when we opened. Ours has a settle point much like Janets and ours is 7.2. It's been right there all summer long without me having to add anything to raise the PH. Not once!

I'm really surprised your PH is still dropping.