I'm very fond of my 4 nerite snails and their tireless algae eating efforts - but! - what a mess they make with all their little white eggs left all over the aquarium glass. I've tried a scrubby sponge and a ceramic blade scraper to no avail. Those things are stuck really hard. I know the eggs will not hatch in fresh water or I would leave them but since they won't, how can I remove them?