Try using some skimmer socks or other some such pre-filter to catch those needles before they get to the pump. I don't know of any pump that would handle the situation better than another.
Here's a picture: http://www.parpools.com/Page/Pool%20...mer_screen.htm
Note: I am NOT endorsing this retailer as I have never dealt with them. They just happened to be near the top on my google search.
Hope this helps.
Regards,
Mark
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