Want to know how to clean reef aquarium tanks? Aquarium cleaning gloves protect your skin from all sorts of potential problems. Some paly and zoanthid corals contain palytoxin, a potentially lethal poison. Corals are sharp and have tentacles, so coral cuts and coral stings are far too common. Further, both freshwater and saltwater aquariums can house vibrio and other bacteria. It is easy to get a cut and bacterial infection from routine tank maintenance. Some aggressive fish will bite to protect themselves. A little protection goes a long way towards safely enjoying the hobby, and keeps your hands dry.