My pebble sheen finish is the black/darkest they carried at the time wenjnstalled. Over time (it was installed in 2009, the finish has been problematic. The pool company came out and did a no drain acid wash several years ago and that darkened everything up for awhile, but this summer we started to see lots of light patches and I was told by them that it should be done again. We are no longer under warranty and they told me to look it up online - so I'm attempting to take care of it myself. I have put a total of three gallons of muriatic acid in (two gallons this week and one gallon today) and here are my latest results:
FC: 5
pH 7.2
TA 50
CH 230/240 (I have a hard time reading this one)
Water temp is 45 degrees.
This puts my index number at -.9. I believe I see
Some improvement but the sun is at such a lower level that it's hard to see it as clearly as in the summer.
My questions are: how long is it okay to leave the index that low? I do not have a heater and my pool does run because of frost protection. I don't want to harm the surface
But I don't want to bring it up too soon and not accomplish the task.
There are significant white streaks in the deep end and a dark streak that I fear is black algae, which I dealt with a bit this year (and that was a total pain).
Thanks in advance for your help!
FC: 5
pH 7.2
TA 50
CH 230/240 (I have a hard time reading this one)
Water temp is 45 degrees.
This puts my index number at -.9. I believe I see
Some improvement but the sun is at such a lower level that it's hard to see it as clearly as in the summer.
My questions are: how long is it okay to leave the index that low? I do not have a heater and my pool does run because of frost protection. I don't want to harm the surface
But I don't want to bring it up too soon and not accomplish the task.
There are significant white streaks in the deep end and a dark streak that I fear is black algae, which I dealt with a bit this year (and that was a total pain).
Thanks in advance for your help!