More food

[Michael W McGrath <mcgrath@citilink.com>]

I have some apisto cacatuoides fry that are about 40 days old.
I still feed them baby brine every day, as often as I can. 
My only concern is what else could I feed them. I have tried
powered flake, they just spit that out, freeze dried tubifex
sometimes is eaten but usually the pieces are too big. Anyways,
I was looking for suggestions on some small food for these guys, things
are not hard to find either. Thanks.