I've been caring for my pool water for a couple of years. It's normally so clear, you have to look twice to be sure there's water in the pool. However, when it rains heavily, the pool takes a hit. About three weeks ago, I had an algae bloom - not too bad - but bad enough. The chlorine level was low, but not depleted.
I shocked the pool and for the past couple weeks, I've had chlorine levels high enough to do the white laundry in the pool. All I'd need is a bit of starch. Still a hint of algae, but mostly under control.
The problem is turbidity. The pool water seems to be rather turbid. I can see the bottom of the pool (eight feet), but it's not close to normal. The filter seems to be in "normal" condition. The vacuum is gleefully running all over the pool.