Thank you for the tip. I will try your suggestion to see if I can get rid of them completely.
My aggie tank has a good amount of Java moss in addition to a load of live plants and brown oak leaves. I am probably dumping too much bbs at a time since the little guys actually survived without any bbs while I was gone for a week (they became free swimming while I was gone.) I marveled at the fact that they had enough to eat on the moss and oak leaves. They were at least a few days into free swimming stage by the time I found them.