Okay here's the basic tank size formulas I've use for SRC's profiles.
Inactive Benthics - Tank/pond length = 3 x shark's length, Tank/Pond Width = 1.5 x shark's length.
Walking Benthics - Tank/Pond length = 3.5 x shark's length, Tank/pond Width = 1.5 x shark's length.
Active Benthics - Tank/Pond length = 4 x shark's length, Tank/pond width = 1.5 x shark's length.
Note - Active Benthic formula is based off the formula used in "The Conscientious Marine Aquarist" by Robert Fenner.
Non-ORV Swimming - Tank/Pond Length = 5.5-6 x Shark's length, Tank/pond Width = 2.5-3 x Shark's Length.
Reef ORV Swimming - Tank/Pond Length = 7-7.5 x Shark's length, Tank/Pond Width = 3 x Shark's Length.
Coastal ORV Swimming - Tank/Pond Length = 8-9 x Shark's Length, Tank/Pond Width = 4 x Shark's Length.
Tank figures for Swimming sharks are based on combination of several sources include Elasmobranch Husbandry Manual, and small to medium sized Public Aquariums.
Also note that increasing the number of sharks in a tank will alter the amount of space needed for the group.