The skimmer is visible at all times, it hangs on the back. I am currently battling a couple different algae issues. I am not really concerned about the aesthetics as much as trying to rid my system of this nasty brown algae. I can scrape it out of the skimmer, but it comes back pretty quickly. I just figured if I could take out one source of algae, it would help overall. If the effort to paint it would not be worth the return I would get, I may just let it go and focus on the rest of the tank.