Tonight while feeding the tetras in my smallest aquarium (7 gallon hexagon), I noticed on the small lid that lifts up for feeding the fish, something very odd. When i lifted the little lid, on the inside of the lid, which is about 3 inches (or 8 cm) higher than water level, something stuck to the lid; it looks like baby corn (for lack of a better way to describe it). What is it??? It's firm, bumpy, and the first thing i could think of was "eggs", but is that possible so far from the water? Could there be some kind of parasite in the tank? Very strange..............