Easy stuff:
1- Let the water mix for a good 3-4 hours, then grab a sample. Your CYA will be zero and your FC next to nothing. The pH is what will probably need attention first.
2 - Lower the pH to about 7.2 with muriatic acid.
3 - Use the
PoolMath to determine the dosage amount of stabilizer to increase the CYA from 0 to 30 ppm. Use a sock to pre-sock the stabilizer for about 30 min, then take it over to a return jet and squeeze all the mushy stabilizer out.
3 - Add 12 ppm worth of liquid chlorine and do your best to maintain the FC level of 12 while following all the tips on the SLAM page.
Be careful pouring the acid into the pool (splashing and wind direction). Store MA away from anything metal and everyone/pets. I keep mine outdoors in a Rubbermaid container. The summer heat won't bother it.
From there, it's all about diligence. Testing the FC as much as needed to stay around 12, and brushing/scrubbing the pool surfaces. Inspect everywhere and stay on it. You should see positive results consistently.