There is a new pool (not added to the signature yet) which has a couple of stains (pictures attached). Small pool.
Please let me know if you need any extra info.
Salt: 4,100 (strip)
Salt: 3,000 (Aqua Rite computer)
The stains look like cigarrette burns on the hot tub.
Any ideas if they can be removed or why do these come out?
Just to pictures of the biggest one. There are like other 2-3 very small at the hot tub and pool and no more.