Pool's been looking good all summer, then one day a couple of weeks ago it started getting a little cloudy and it's just gone downhill since. Had a massive algae outbreak that took too much effort to get under control. And even after that I can't get the water to clear up. The water test says all is okay. Alk drops a little tiny bit now and then but a couple lbs every few weeks fixes that up. The pool shop asked how old the sand is, but I didn't know I'm guessing more than three since I bought the house bout three summers ago. I haven't changed it and I doubt the previous owner did in their last couple of years.
I don't know for sure the sand is the problem but the pool store is hinting at it. Since I don't know it's age I can't eliminate it. The filter is Triton II tr140, it's huge and tucked away in a corner so it's going to hard to work on. If anyone has any other ideas before I start I'm open.