You might have to clean it rather frequently. Small particles that would normally pass through the filter and pump without harm could plug up a fine netting quickly. That is one objection many of us have to the filter sponge that comes with many pumps. The net might also get drawn into the pump.

I used quilt batting around my pumps for several years but got tired of constantly having to pull them out of the pond and clean them. My back couldn't take it anymore so this year I built a Skippy Filter and just set the pumps in the pond. Seems to be working well.

Skippy seems the best way to go - that's my next upgrade.