The problem: I have some eggs stuck on the glass that I'd like to protect. They are snail eggs, tightly adherent and not readily removable to any sort of refuge. I've had limited success in the past using a dryer washer, which consists of a domed wire mesh attached to a rubber ring, placed over an egg mass to protect it from predators, but this is difficult to attach. The best I had done so far was just to prop it against the side with a stick or wire, but this isn't practical when the eggs are high up on the glass as the present batch are.
I'm hoping there's an easy adhesive compound that would allow me to just stick the washer directly on the glass. It must be nontoxic to fish, obviously, must be applied to a surface already underwater, and must be readily removable after the eggs hatch. Any ideas?