window screen in reef tank

[fishmaster]

Thanks for the the advise. Good call on the window screen clogging. I won't use it. Where do you get the gutter gaurd? How small are the holes? My overflow box is acrylic with 1/4" slots. I've covered it with rigid plastic mesh(used for crab trap bait cages) with 3/8" holes. Still not enough to stop this little guy. He hasn't gone in there yet, I'm just trying to be pro-active. If he gets in there, he'll be sent to the filter bag in a hurry.
Shaun.