Anyone else have a breeding population of these in their tank. I find the smaller ones, about the size of a dime, all the time in my sump. At night I can usually see about a half dozen or more larger ones in my main tank. For some reason, I don't usually see the smaller ones in the main tank. I will usually remove some of the smaller ones in my sump and put them in the main tank when they get some size on them. They seem to be perfect inverts for an aquarium, being that they eat algae, are interesting and pretty to look at, and I'm assuming easy to get to breed. I'm wondering why they aren't offered for sale? Perhaps I need to start a business!