So around two days ago I noticed just before lights went out that one of my Ceriths is on the front glass after I cleaned a small viewing window in order to see everyone past that damn Cyano that been keeping me busy. Lo and behold the next morning there is a cluster of eggs right in that spot. I looked up pictures of Cerith snail eggs and I am sure its them. Its only been 48 hours and some have already hatched. I love to put pictures but u almost need a microscope to see them. From 9:30 am to this morning the ones that hatched went from just a white dot moving around the tank to actually having a small shell u can see behind them! I would say only 1 percent of the egg mass has hatched.