I have a pool that was black, 2 bottles of shock later it turned green (a huge improvement!). The pool place told us to keep adding shock, and over a 2 week peroid we added a total of 4 gal bottles of 12% bleach. They also suggested we add chlorine tablets so we added 1 "blue shield slo poke" chlorine tablet last weekend. We bought a cheap pool test kit and saw the ph was at the bottom of the color chart and added blue shield ph increase (looks like its just sodium carbonate) and it later tested at the recommended 7.6.
The pool wasnt getting any better, i searched around and found this forum and ordered a tf100 which we got today. I havent added any chems to the pool in a few days. The last thing was 1/2 a gal of 12% bleach 3 days ago.
I figured the pool would have relatively low chlorine since im alot of what we added was used up, and we didnt add enough to really shock it correctly. I also assumed our CYA would be low since i never added any stabilizer, unless it was included in something else we added.
But the results im getting from the tf100 are weird....I reran all the tests with another water sample just to make sure.
I try to measure the TA...the water turns blue & yellow which is noted may happen with a color shift...but after 40 drops of reagent it still hasnt turned red. Not even faint pink. I run the test again adding the reagents before it turns to yellow (I dont think that'd really make a difference but i tried anyway)...same result. I figure whatever the number is its really really high and not worth wasting more reagent.
I measured the ph/chlorine...the chlorine side turns orange, from high chlorine levels maybe?...and the ph side turns yellow. I thought i had reversed the reagents so I did the test again, then again with the old cheap ph test kit I had...all the same results. Safe to say the pH is really really low.
The water is green, and you can only see about a foot into the water. We cleaned out huge amounts of leaves from the bottom when we started...there was even some things growing in there (yikes!) but we dont find any on the bottom now, but the skimmer fills up with leaves and stuff a few times a day. We've scrubbed the sides to release any stuck material/algae a few times. The pump/filter has been running 24/7 for 2 weeks, backwashing regularly.
So where to start? Raise the pH to a normal level? Any idea why my TA is so high?