I know this is an old topic, but for my first post I would like to showcase my Eheim 350 Skimmer Mod... Well, I guess I dont know how to add pictures...
Anyway, I used a simple comb my wife recieved from a flight she took. The comb was the typical fine/course comb/combo.
On each opening of the Ehiem 350 Skimmer, I simply snapped off a bunch of the course fingers of the comb, and then glued them in place. The superglue didn't want to dry fast enough, so a tiny sprinkle of Baking soda hardened it right up. I used two fingers per opening. I haven't lost a shrimp, or Tetra yet, It's been 7 months. The fingers and glue also do not affect the boyancy of the floater.
If I can or I become allowed to post pictures I gladly will. Thanks and I hope this gives someone an alternative to ordering the fancy mesh... We all like fancy meshes though, but who doesn't have a sacrificial comb lying around?