Hello, I'm hoping maybe someone can shed some light on a problem that I can't seem to figure out.
Beginning about halfway through last season, I began to have a problem with algae. Every day or 2, I would find a few small patches of algae in the pool and would have to vacuum. Multiple water tests (my own and a local pool store) showed no problems with water chemistry. Iíd shock and sometimes be ok for a few days, and sometimes it made no difference at all. Also, I struggled with mild cloudiness throughout the season. We went on vacation for a week in late August and when we came back, it was completely green to the point that we couldnít see the bottom. Frustrated, I just closed it up for the winter.
Last week I removed the cover, and obviously it did not get any better. Long story short, in the past week I have put 8 pounds of shock into the pool, and all it has done is change it from emerald green to an olive drab color. I can see pretty heavy particulate matter suspended in the water as well.
Now, for my filter question Ė I have good suction and plenty of pressure at the outlet. Iíve run the filter continuously for the past week, backwashing twice a day. When I backwash, I get some green water out, but only for 5-10 seconds, then it runs clear. It seems to me that I should be getting a lot more nastiness out of there when I backwash. Could a failed spider gasket be allowing some or most of the water to bypass the filter sand? Anything else I should be looking at?
Iím likely going to drain and refill the pool regardless, just to start with a clean slate, but if it is the filter that is causing this problem Iím just going to wind up with the same issues this year. Any input will be greatly appreciated. Thank you.