I know nothing bout this but, I would think any kind of pump would be getting pretty rough with them. My guess is they will to small and soft to make it threw in good shape.

The people who say I can't do it can just sit the @^#% down and watch me. Friends call me Rusto I also subscribe to pond boss mag. http://forums.pondboss.com/ubbthreads.php?ubb=showflat&Number=504716#Post504716