when I first filled my pool from my well at the beginning of this season the water looked fine until I added liquid chlorine and the water turned green. My PH was also high but I don't remember exactly what it was since I had an el cheapo 2 tube shake n bake chlorine and PH kit. I read everything in the pool school and scoured this great site. I went out and bought more liquid cHlorine, Borax and baking soda and proceeded to fiddle with PH. At some point I did something and within 15 min the green simply vanished like magic. I counted my blessings and promptly purchased the TF100 test kit. All has been perfect for the entire season until about 2 weeks ago. I was away and for reasons that are to long to elaborate the PH went way up and chlorine went to zero. Since then I have been struggling to get it back to crystal clean from the green tint it now is.
The water does appear to be a bit hazy but there is no slimy feel to it or any of the surfaces on the vinyl. This green has the same look and quality of that original green I described earlier. 3-4 days ago I finally managed to get the PH and TA in good range. I have added water over the summer a few times, each time when it was down about 2 - 3 inches. 3 days ago CYA was 35 so I added about 2.5 Lbs to hopefully bring it up around 60. I figured I should get PH right before really shocking.
three days ago the numbers were:
Added muriatic acid and cyanuric acid and bleach over the next 24 hours
Added 4.5 gallons chlorine and 4.6 Lbs baking soda during the course of the evening. baking soda 1st then bleach 4 hours later.
PH crept up so I added about 26 oz muriatic acid
It has been about 5 hours with no noticeable difference whatsoever in color.
I really think this is copper at this point. Is it possible that the 1st time I got rid of the color so magically that it was because I went too low on the PH. I seem to recall using Borax to bring it up at some point. I wish I would have taken note of what I did back then.
Will a low PH sequester copper? Is it possible to turn water green by adding bleach?
The green now seems to be different from the initial green of a week or two ago. maybe I killed off the algae but now am left with this same green issue I had at the beginning of the summer.
I have been back washing but it is not unusually frequent.
Any thoughts or help would be appreciated