Scuba tanks, also known as diving cylinders, are essential pieces of equipment for underwater exploration. They store compressed air or other breathing gases, allowing divers to breathe while submerged. Typically made from aluminum or steel, these tanks are designed to withstand high pressure and are available in various sizes to accommodate different diving needs. Before diving, it's crucial to ensure that the scuba tank is properly filled and maintained. Regular inspections and hydrostatic testing are necessary to ensure safety. Divers must also be aware of the tank's pressure gauge to monitor their air supply during dives, ensuring a safe and enjoyable underwater experience.