We bought a house with a gunite pool. Just had it retiled and marcited. It's a 21,000 gal sport pool. We filled with city water and the pool guy added 2 gal muriatic acid, 3 quarts Pro Guard stain and scale preventer and one gal chlorinated pool shock. He told me to keep the chlorine low for a week to prevent marcite staining. Per his instructions, I added stabilized chlorine in a floater. Within 4-5 days the water was cloudy. The chlorine level wasn't registering, PH was 7.2 and alkalinity was so high it wouldn't register. We've been dumping in chemicals all week. Since we are new to this, we need advice. So far we've added 3 gals muriatic acid and 12 gals 10% pool sanitizer. (It was cheaper than bleach.) There is all kinds of foam on top of the water and it is still cloudy. Last readings were alkalinity 150 ppm, chlorine 4 ppm, PH 6.8 and hardness 500. What should we do next?