My pool is cloudy and it will not clear up. Suggestions????
I have a 20,000 Gallon diving pool that is cloudy and will not clear up. I have taken the water to a pool shop several times to have the water tested, and everything is perfectly balanced. I am at a loss because this is the only time I have had problems since owning the pool. Here is a rundown of the problems:

I live in PHX and the temps are abnormally high and have been for almost 2 weeks (110+)

Pool drained last year because of a water "lock up"

Repaired several small air leaks and replaced all of the seals and o-rings this season.

Removed the sand in the filter and replaced it with zeobest.

The only problem with my water is that the cyanuric acid level was at 254. Could my water be "locked up" again? How could the cyanuric acid count be so high if my water is only 1 season old?

I have done nothing out of the ordinary with regards to shock etc. or other maintenance.

I run the filter for 10 hours each day also.

HELP. I am getting really frustrated