That makes sense. Hopefully I won't have too much trouble with it spreading too much; the colony I have doesn't have too much room to spread at this point. I'll have to see I guess. I liked all of the information on the snails! My cerith snail egg bundles haven't produced anything yet. However--recently I found a snail "hitchhiker" that looked a lot like a small turbo. I do have two large turbos in the tank. I hadn't heard of them breeding, but I just don't know what else it could be... very strange!