Hi guys. I am having trouble measuring my CYA. BY all accounts, I should have level 25 of CYA, but when I do the tube test, I can see the black dot (very faintly), no matter what. What am I doing wrong ? (by the way I put in this CYA directly into the skimmer a week ago)
Also ---based upon how much CYA I put in. My PH should have gone down from 7.2 to 6.8--so as a result, I added enough borax to bring it back up .40 so it would remain at 7.2 ...instead my pool is at 7.8 or greater. Its almost like the stabilizer had no effect. What am I doing wrong ?
Thanks in advance.