most of my tanks are crowded enough, this may not be possible, but I'd like to develop a feeder colony of two in a few of my tanks... my nano tank would be the easiest, but I'd like to on one of my bigger tanks... lots of hiding places, and large root balls for micro fauna habitat, in most tanks... I'm trying to establish neo shrimp in a few tanks right now, but I'm thinking smaller critters... seed shrimp or??? looking for suggestions to try...