I used to have a couple hundred but now I just see a few now and then. Same goes for the little micro britlle stars. It seems that they go in cycles so even if you get a dozen it may or may not take off. But it is worth a try because they are good cleaners and are usually out of sight when the lights are on.
Yep they are great cleaners I used to have a bunch also. They are just like berghia populations explode then die off with food supply. If I cant find any by Monday I guess I will break down and order from IA. Just hate to pay $30 bucks shipping for such a common item.