Not sure what these light tan-ish brown stains are on the floor of the pool? Its an older pool we took over last year when we purchased the house and noticed a few patchy spots like these last year as well,I was hopeful last year that it was due to the previous owners lack of proper chemistry and never really bothered with the few areas because the liner is overdue to be replaced and new we would be doing it soon (next spring) but the past few days or week ago we have started to see the same stains and seem to be additional ones appearing ?
Hopefully the pics below will be able to shed some familiar light on the issue and someone can point me in the right direction to clear it up a bit for the season or at least let me know its an issue that may have happened in the past and not to worry about it possibly effecting anything (swimmers) or a new liner when installed ? My recent test results are below and seem to be fine ? Should I test for something else?
I have well water hooked to a softener for makeup fill water .Water is super sparkly clear and everything but the old liner look ok....