I just noticed that we have rust colored speckles pn pebble tec. Most of it is on steps and shallow end. None in deep end except on the bench seat. I scrubbed an area really hard and it did not seem to make a difference. There are some areas that I have scraped my fingernail on and it came off. Any clue what this might be? My pool is crystal clear.
FC - 4
CC - 0
TC - 4
ph - 7.2
T/A - 50 **** currently adding baking soda to bring up
CH - 290
CYA - unknown
Here are some pics:
FC - 4
CC - 0
TC - 4
ph - 7.2
T/A - 50 **** currently adding baking soda to bring up
CH - 290
CYA - unknown
Here are some pics: