Had my inground liner pool for 20 years, pool was fine yesterday, came home today, water is brown.... I tried to read through some of the posts, some I can't access.
What would make my water do this, and how do I cure the problem?
(I have had my pool for 20 years, I have only had to take care of it the last 5 years, ex-hubby took care of it before that, so a bit lost)