lol thanks wendamus, but I have just over 20 ramshorns crawling all over the tank laying eggs wherever there is space, even on each other's shells! They're all about the same size as the ones that are pictured, so I've led the horse to water, it's just not drinking.
Also, it might very well just be my imagination but they seem a little more active since I added gravel. Could be the increase in temp to 78 though. Fingers and toes are crossed that the next step is eating...