When you wake up in the middle of the night and test your water at 3 in the morning to make sure everything is okay.....2 best ones so far, tour guide at marine world, and the fire escape plan. When I turn 16 I'm going to work at my LFS because they get a 50% DISCOUNT!!! On anything, tanks, fish ,anything. When I work there I'm so upgrading to like a 400gal tank.