Hi Alex,
I am very impatient, so I spent over a $1000 in 2 weeks trying to clear a pool, then found TFP, ordered a kit but wanted to get started before kit arrived so I took sample to good old pool store PH was High (do not remember # now) was told to add 5# of dry acid to bring it down to 7.2. But I was smart ( or so I thought) I could use poolmath to double check poolstore, and surely a poolstore could get PH correct (or so I thought). So when I checked poolmath using poolstore # it told me to add half so I did. Low and behold the next day TFP-100 came the next day (only took a day and a half). Measured my ph and it was 6.8 which is lowest the scale will read. Too make a long story short took me 2 days and 8# of borax to correct my mistake. So relying on poolstore # is a shot in the dark. After that I tried a little experiment and took a sample to 3 different stores got the test done within 1.5 hrs of taking sample, none of them were the same and did not correlate to TFP-100. 2 of the stores were Leslie's so they had same equipment. Try it yourself. So the kit is of prime importance, too much chlorine can damage equipment, too little algae will keep growing. I also would hold off on that stabilizer, I think a drop of CYA from 40 to 20 without a massive water change is highly unlikely unless you have ammonia in water. But I think it more an error in testing. If you get CYA too high it will not be practical to SLAM. Best of luck I hope my experience helps you not make similar mistakes.
I am very impatient, so I spent over a $1000 in 2 weeks trying to clear a pool, then found TFP, ordered a kit but wanted to get started before kit arrived so I took sample to good old pool store PH was High (do not remember # now) was told to add 5# of dry acid to bring it down to 7.2. But I was smart ( or so I thought) I could use poolmath to double check poolstore, and surely a poolstore could get PH correct (or so I thought). So when I checked poolmath using poolstore # it told me to add half so I did. Low and behold the next day TFP-100 came the next day (only took a day and a half). Measured my ph and it was 6.8 which is lowest the scale will read. Too make a long story short took me 2 days and 8# of borax to correct my mistake. So relying on poolstore # is a shot in the dark. After that I tried a little experiment and took a sample to 3 different stores got the test done within 1.5 hrs of taking sample, none of them were the same and did not correlate to TFP-100. 2 of the stores were Leslie's so they had same equipment. Try it yourself. So the kit is of prime importance, too much chlorine can damage equipment, too little algae will keep growing. I also would hold off on that stabilizer, I think a drop of CYA from 40 to 20 without a massive water change is highly unlikely unless you have ammonia in water. But I think it more an error in testing. If you get CYA too high it will not be practical to SLAM. Best of luck I hope my experience helps you not make similar mistakes.