new to the board and to owning a salt water pool. Let me give some background information so that hopefully someone can tell me if I am on the correct path. After following the pool builders advice I put all 9 bags of salt into the pool. It threw the salt content to 4200 ppm for a 18000 gal rectangular shaped pool. I drained out approx. 4,140 gallons and replaced with fresh water last Thursday. My new salt reading is 3000 ppm. I noticed on Saturday that I had almost no chlorine even though I had the goldline remote set to 70% for chlorination. I called the pool company back yesterday and was told if my PH is too high, it could be eating up all of the Chlorine. I checked it and it was high, 8.2. I ordered a TF-100 Test Kit yesterday so I don't have all of the specific readings yet. According to the pool calculator I need to put in 30 oz of muriatic acid, which I did. After 4 hours I retested and it had come down to 7.8. I put in an additional 17 oz of muriatic acid. I rechecked this morning and it was still at 7.8. Should I put a 3rd round of 17 oz of acid in the pool?
I'm not sure how long it should take for the equiptment to turn over the water in the pool. I have a Hayward Northstar Main Pump and booster pump for the water features. Any and all help would be greatly appreciated.