I have a newly replastered inground pool that is now about 3 weeks old. The new plaster is just regular plaster with no color or agregate.

The pool is a salt water pool and is about 18,000 gallons. I live in central texas.

Every day I am checking the chemistry, and the chlorine is spot on (1 to 2ppm), the Alkalinity is 100, the salt level is 2800 or 2900 ppm.

However, the Ph is constantly high 7.8 upto 8.2 which requires 2 to 4 cups of Muriatic Acid to bring down to 7.5.

So thats 2 to 4 cups of Acid EVERYDAY! or just over a Gallon a Week!

What am I doing wrong?

The pool runs for about 8hrs a day, has a raised spa that water trickles over, and has a beach area.

Please help!!
Oh... it also has a DE Filter...