Tank Capacities Depend on the Diver's Needs

Divers want a scuba tank that is lightweight but has the capacity they need for air. Check out this list of tank capacities and how they fit divers' needs:

• For shallow diving, all you need is a 50 to 63 cubic foot tank.
• The 80 cubic foot tank is considered standard and can be used for deeper dives.
• People who are heavy breathers -- often large men -- may need more air capacity. There are 100 cubic foot tanks that should serve them.
• Finally, pony tanks are backup spare air tanks that are smaller in size and used in emergencies when primary air fails.