My mated clowns have finally began to breed again, after having been moved from the main tank to the biocube.

I have noticed them in a cave the past week, and after looking all around- I can definitely see the clutch. The male is carefully and diligently working at the eggs.

What is the best filter to put in front of the filter wall in a 14 gal Oceanic biocube- so that the water still can pass through...but the frye will not?

I do not want to risk moving the clowns again- as they took awhile to breed since last move, and I would prefer to keep the frye in the biocube.

Is this possible? Has anyone ever done something similar to their cube?

Any ideas?

Thanks!
-chelle