Finally got some K2006C numbers.. please look

[Watermom]

Go ahead and shock your pool up to about 10 or so. In your pool, each quart of 6% bleach will add just a little over 1ppm. You can use that as a reference to help you figure out how much bleach to add.

Bump your pH up a little with some Borax. Start with half a box added slowly to the skimmer while the pump is running. After a couple of hours, retest and redose. I'd suggest doing the pH adjustments before you shock your pool as high chlorine levels make it hard to get an accurate pH reading.

Don't worry about the alk for now.

Run your pump 24/7 while you are trying to clear it and backwash whenever the pressure rises 8-10psi over clean filter pressure. Your pump is awful big for this pool. That makes it harder to clear the water as it forces stuff through the sand bed and back into the pool instead of trapping it in the filter media.