Hi Mark;

#1 - Buy some stabilzer (cyanuric acid), then clean your filter and add 3# per 10,000 gallons of pool water, directly to your skimmer. Leave the strainer basket in place, and make sure your pump is running 24/7. It will take 3+ days to dissolve, so try to avoid having to clean the filter during that period.

#2 - Buy some muriatic acid, and add about 1 quart per 10,000 gallons. Wear gloves & glasses, and hold the acid close to the water when you pour. Avoid the fumes. Don't try to get it just right -- add some, and test the next day, and add more as needed. Stop when your pH is about 7.2.

Dose nightly with 1 gallon of bleach per 10,000 gallons, till you get stabilizer in the pool. Be VERY careful not to let any of the chemicals (bleach, cyanuric acid, muriatic acid) touch each other directly.

Retest after you get these things done, and post results.

Ben