Get Glass Gleaming
Keeping the aquarium glass clean both inside and out is also important, not just for aesthetic purposes, but also to keep algae under control. First, scrub inside glass with an algae scraper (you might want to do this before the water replacement process to avoid releasing algae gunk into the fresh supply). Then, for the outside glass, apply some vinegar to a paper towel, and wipe the surface. Avoid commercial cleaners as they can be harmful to fish if accidentally mixed in with the water source.