I currently have a Red Sea Reefer tank lid on my aquarium, mainly because of a diamond watchman goby. Unfortunately, it passed away, and I’m now wondering if I should avoid replacing it and remove the lid. The main reason for removing the lid is that the aquarium looks much cleaner and sleeker without it. The great thing about a goby is that it keeps the sand nice and clean, and it’s also a very entertaining fish to watch in action.