I am adding the watchman goby back to my tank soon and want to cover my tank so that he doesn't jump out. I have halides, a lot of coral and clams so I don't want to have any shading going on. Also, I don't want to use acrylic or glass in order to keep the temp of the water down. What is the best method to use for this? I have heard that deer netting works well but am worried that it might not be fine enough?