hmm, maybey try one of those little plastic hang on breeders in your sump. You can configure them a bunch of ways. I use mine to isolate new introductions to my tank, but you can set them up so that the eggs and fry fall into a separate chamber from the parent and they can stay there until they mature. I got mine for about $8. Pretty handy.
If noone else wants that pepermint shrimp, my Hawkfish says he'd like a snack.
If noone else wants that pepermint shrimp, my Hawkfish says he'd like a snack.