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    Mystery stains on liner

    Hi all, I'm stumped on this one. So this little patch of yellow/brown stain appeared towards the end of last season. Can't brush it off, looks like a stain but thought it might be organic so I SLAMmed. I worked hard to keep FC greater than 30 ppm for a few weeks but the stain remained, and it...
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    high FC won't drop, high CC going on 3 weeks

    Hi all, I've had my pool for about three years and have had no issues at opening until this year... After I opened the pool and did the initial shock, I noticed that my FC levels were off the chart high on test strips but my water still smelled like chloramines. I shocked with non-chlorine...