This summer will be my third with our pool. For some reason, I'm having an absolute nightmare of a time trying to get my pool to clear up. I've been at it for weeks, testing constantly and being advised by the folks at the local pool store. I'm generally not one to buy every chemical they suggest, sticking to just chlorine and supermarket chemicals for the most part. At this point though, I'm at a total loss for how to proceed and even the folks at Leslie's are running out of ideas.
I have a fiberglass pool, somewhere between 16-18k gallons. It's very difficult to get a measure because it's a strange shape. Sortof a wave, with little seats in 3 corners. The depth ranges from 3 to ~5 feet. The current water chemistry is:
Sand filter, around 16-18k gallons. I'm in Atlanta, with trees around the property but nothing directly over the pool.
FAC: 5 (the Leslie's rep said 7.6, but wrote 5. My home kit only goes to 5, but it was darker than that).
TAC: 5 (ditto)
Here's the rub. Being fiberglass, it's very prone to metal stains. I fight them every summer. When I first shocked the pool this year, the whole thing turned dark brown. I pushed on ahead, getting all the chemistry right, then took a sample to Leslie's to have it checked. When all was in line, they had me use a stain remover and Metal Free, saying that the cloudiness that remained was probably due to copper. I used around 3 lb of ascorbic acid, then the Metal Free, and it cleared the stain but the pool stayed a cloudy green. I went back in with a picture, they said throw some algaecide in. I don't generally use a lot of algaecide, but at this point I'd been trying to clear it with just chlorine for weeks and it wasn't going anywhere. So I used a 50% non-copper algaecide and the pool started to stain again. I've got more ascorbic acid, so I'm not as upset as I might otherwise be (it's expensive). Still, I don't want to refight the stain until the pool is clear. Right now it looks like this:
The Leslie's guy sold me a different algaecide and some PhosFree today and told me to try that. I've never used PhosFree, or had a phosphate issue. In fact, it tested at zero last week. The ONLY thing that could have put them in there is the algaecide or shock, as I've added nothing else.
I'm really just not sure what to do here. If I could just get the stupid thing to clear off so I could start vacuuming and cleaning I'd be in good shape inside of a week, but I've yet to see the bottom of the pool this year. It had to stay uncovered for a sizable chunk of winter (the dog more or less destroyed the old cover), but the one I had never really worked all that well to begin with. There weren't any more leaves and other junk in the pool this year than in times previous.
Thanks in advance!