I have had great success with them. Great hair algae eaters. They did a great jub on some sort of weird turf algae I had a year or so ago. Had it cleeaned up in a few weeks. Instar used them to help with a Bryopsis problem. They ate the roots of the bryopsis after he plucked the tops. Their good detritivores also. I looked on the Reeftopia site the other day and they were out of micros, but they had smalls.