OK - we have had a LOT of wind and rain and I have a ton of pine trees. When the storms come in, a TON of pine needles and other tree debris fall into the pool and the winds push them to the tanning ledge. This happens 2 X a year and I go out and empty skimmers 2X a day during this time and scoop as often as I can. We have had rain and winds everyday for a couple of weeks. I normally don't use pucks but I have pucks in to help keep up with FC during this mess.
Yesterday evening I went out, tested, scooped, emptied skimmers and went to brush and I noticed brown STAINS on my tanning ledge - in the 2 spots where the pine needles always congregate. No matter how much I brushed they didn't lighten at ALL. So I did my normal stuff and thought I would come ask here today. Also had nightmares last night about ruining my pool! I just went out to take pics of it in the sun and the spots are GONE.
WHAT was it? Any ideas?
FYI - cuz I know you all want to know.
FC 4-7 (It is between 3-4 when I test in the evenings and I up it to 7) I use bleach but also have pucks right now because of all the rain and crud in the pool.
PH 7.8 (It raises to 8.1 - about 1-2X a mont I have to add 12 oz of Acid to drop it)
CYA 40 (haven't tested in about a month)
Thats weird right? Here is where the spots WERE and it wasn't like you had to look for them - they were THERE and large like 2-5"
[IMG]Untitled by Wendy Baldwin, on Flickr[/IMG]