Ok, time for an update and hopefully some help.
I got my sand filter installed and refilled the pool a week ago. I had the pool store test the water when it was about 1/2 full, and CYA was 0, so I added the rest of what I had which was a little short of what Pool Pal said to add in order to bring it up to 30.
Once the water level was to the point that I could start filtering, I tested the chlorine and CYA. I got just short of 30 for CYA, so I added bleach until I got to 12 for the FC. The green was gone in less than a day, but it's been pretty cloudy ever since. I've tested at least twice a day and brought the FC up to 12 (or 18 once by accident) and have been running the pump 24/7.
I bought some DE today and after testing and bringing the FC up, I backwashed, rinsed and then added the DE to the skimmer. It only took 3/4 cups to raise the pressure 1 psi.
I ran the rest of the tests just now, and here's my numbers:
FC - 6.5 (added 64 oz of 8.25% to bring it to 12)
CC - 0.5
pH - 7.4
TA - 70
CH - 80
CYA - sub 30, but not by much. I can still see the dot with the tube full.
Anything in those numbers that would point to why it's so cloudy?