Here's a pic of the snail eggs on the glass. One batch has apparently hatched off as the egg bubble has a hole in it and the baby snails are gone...no idea if they'll live or not. Anyway, my guess is that incubation time is about a month...rough estimate.
I know that front glass looks awful
, but I haven't really done anything much to it since the eggs showed up because I didn't want to damage them. My other snails (who are supposed to be taking care of this for me!) are getting lazy it seems...