Hi everyone, I'm new to this forum and can definitely need some help figuring some problems with the filter that I have.

The flow rate with the filter is ALOT slower than just the pump alone. I understand that I should see a decrease in flow rate, however last summer when I used the filter, the flow was amazing! Recently I also tried vacuuming the pool, and to my surprise the entire filter collapsed! All of this has never happen before, and when I tried to backwash, the flow rate coming out of the waste pipe was VERY slow too. I am really clueless of what I should do from here, please help!