Thank you so much! I have a sand filter. Yep, the pool really is 40K gallons or so the pool builder says. Nothing much of note the week before the cloudiness began. The pool has been crystal clear since we opened it this spring. My test numbers come from the pool store. I took water back in about 6 hours after adding oxidizing shock.

Now my numbers are:

FAC .5

TAC 5

pH 7.0

Cyanuric Acid 15


I have an inline chlorinator that uses 3" tablets.

Questions:

How much borax should I add to raise my pH?

Do I need to add a stabilizer with the bleach?

Again, many thanks!!