One of our snails has laid eggs outside (on top) of the tank (got out thru a gap in lid). As all our fish continue to keep dying (have just started tank for my 4 and 3 yr old) we are quite excited about the possibility of something not only living but breeding!!!!!! Do these eggs have to be in water to reach maturity? If so, how do I move them without damage and if they are moved into tank will the two remaining comets (of the initial 12 purchased in last 10 days) eat the eggs???? Help PLEASE