How do you 'nem proof an overflow box?

[alaska clowns]

I have nylon stockings around my koralia powerheads, but I was wondering what you do to safeguard overflow prefilter boxes from a possible wandering BTA? The stockings don't allow enough flow into the box. My BTA hasn't moved since I placed it, however, I'd so rather be safe than sorry
Thank you for your help!

 

[katarina]

I put a glass lid with a trimable plastic back on my tank. The top of the overflow and the lid are pretty much flush. You just have to cut the plastic to fit around the tube at the back of the box.

 

[kulture]

Plexi glass.. I cut a piece to go on top of the overflow.. I was more worried snails would adventure into the overflow and clog it up. Buy I'm sure it will work for nems to.

 

[alaska clowns]

Thanks.... but I was actually more concerned about the anemone getting sucked in through the teeth of the preskimmer box of the overflow rather than going up and over the top of it, since my water level won't above the teeth.
Anyone have any more ideas about how they nem proofed the prefilter box of a HOB overflow? I have a bubble tip anemone.
Thanks!

 

[kduen]

Window Screen?

 

[Anemone]

Window Screen?

Yep, nylon window screen.

Kevin

 

[saltymight]

egg crate