Bad News: The eggs lasted 2 & 1/2 days before going fungus or falling off. I would say this was largely due to the eggs being placed on a sword leaf that did have a small amount of algae on it.
Good News: I repositioned the breeding cone into the same area, and as of 3 hours ago, they have laid and fertilised anything up to 250 eggs... they are everywhere, and are nice and dark coloured (fertile)...
i went thru it six times before i saw my first wriggler!
worth it !!!
Pro you should post up more pics of them and your tank set up. I just recently set up my new planted tank for my adults which arrive in several weeks time.