upgrade to an external pump?
 

My pond is 10x12 about 2 1/2 feet average depth and kidney shaped
I have been using a sump from Home Depot in conjunction with a
biofilter with built in UV light. Seems to work ok, but I hate having
to clean it by pulling it out of the pond and I fear it breaking and
spilling oil all over. What would be a good external pump setup for
me? Do you reccomend a bell shaped bottom drain? Any suggestions?
Power consumption seems high on this pump too
Thanks