Hi,

If your pool is 15 feet in diameter with a 48" water height, I'm calculating about 5300 gallons. With a CYA of 100, you have to get the chlorine up to 25 ppm and hold it there by testing and adding more chlorine to stay above the 25 ppm mark as often as possible, until the pool clears. In 5300 gallons, each gallon of 6% bleach will raise your chlorine by 11.3 ppm, so 2.5 gallons will get your chlorine from 0 to about 28 ppm (it won't stay there long, though). After the initial dose, the more often you can test for chlorine and bump it back up, the faster the pool will clear. For additional doses, each 1.5 cups will raise your chlorine by 1 ppm. The more consistently you stay above 25 ppm, the faster the pool will clear.

Going to Leslies and letting them sell you the store isn't a good idea--it's probably why your numbers are so out of whack. Your pH seriously needs to come down to the7.0-8.0 ppm range, but if a lien on the house is at stake, I would concentrate on the chlorine and clearing up the pool, then fix the other stuff later.

You're going to need a reliable way to test your water, and strips aren't gonna do it--at the levels you'll have to maintain, the strips will bleach out. Try going to your local WalMart and see if they still have any of the 6-way drop-based kits that sell for around $20. IN absolute worst case, you can get the pool store to do the testing, but do NOT buy any of the stuff that they will want to sell you. Your hardness is already to high for cal-hypo, and your CYA is too high for dichlor shock. Bleach is gonna the the answer for you, unless they sell liquid chlorine, which is just double-strength bleach but sometime at a lower price.

Good luck with it!