I just opened my pool today and it was real dirty. I set up the filter and ran it. About 3 hours later, the flow back to the pool was so low that it wasn't even even moving the water. I regenerated the filter, because the water was so dirty when I opened, that worked for about 20 minutes then it was right back to low flow. I regenerated a few more times, with similar results. So, I decided to put in new DE. I emptied the filter and put in new DE. That worked for about 2 hours and I was right back to the slow flow. Is my water that dirty or is my filter gone. The pump is only two years old. Any suggestions and advice would help.

Thanks