My two nerites have been laying eggs all over my twenty gallon. Usually I scrape them off the leaves and move on because I know they are hard to breed in freshwater conditions. However, I have a question. Instead of the usual sesame seed color, eight eggs I've just found are an olive color just like the patent snail. Does this mean these eggs are viable or just rotting away. They are very firm and very attached to the leaf I found them on. Ideas?