I am in the process of setting up my new aquarium and was hoping to harvest eggs and hatch them after spawning. Also I want to be able to build a contraption to protect my conch or other invertebrate eggs should they reproduce. Now this leaves me with 2 issues. I have a tall overflow box spanning the height of the tank with 3 separate weirs, the second is that this will be a reef tank. So what type of mesh and materials could I use to cover the weirs to collect the eggs (I was thinking maybe mesh with the use of magnets) and what type of mesh and materials could I use to cover any invertebrate eggs that may be stuck to the glass or reef to protect the eggs frim being eaten by fish. Any ideas would be appreciated.