As I've posted elsewhere, I'm now into week 4 of cleaning my pool. I think the algae is dead (or most of it) but there is so much suspended debris that it is taking forever to clean the pool. I also had some air leaks on the suction side, so for the first 3 weeks, the pump\filter was not operating at optimum efficiency. In the last week I fixed the air leak and I'm cleaning the filter 2-3 times a day (Sta Rite 450 sq/in cart). Progress is finally being made. The water is still extremely cloudy but I can finally see the third step (and a brick that is in the shallow end. I bounced it off m head in frustration, hoping I'd be knocked out and fall into the pool, but no such luck).
That said, this is about as slow as I've ever seen the pool clear. So slow, I started to think maybe my filter carts are shot. So, I decided to just filter my spa. It is about 350 gallons. It took about 4 hours to get is reasonably clean. My pool is 50,000 gallons. If I do the math, and if the filtration rate is linear, that works out to about 570 hours to get the main pool clean. Please "say it ain't so". If that is the case, then that puts me into September before this thingis clean and I might as well bag it.
I'm going to do some vacuuming to waste, so that should help but this filtration rate is way too slow. Perhaps I do need new filter carts after all. I suspect the filter may be letting too much finer stuff through and that is why it is taking so long to clean this thing.
So, is my extrapolation on the money? If it is, time to fish out that brick from the shallow end and try again...