If I had to narrow it down to two, I would say Reef Revolutions and Aquarium Oddballs. But, Reef Revolutions, Ultimate Reefs, and Premier Aquatics are all within a mile of each other, so it would be a waste not visitting all of those. If you book it, you can see all four OMAS sponsoring stores pretty quickly. Here's some more info.
Aquarium Oddballs
Owner - Scott Tracey
6115 E 31st St
Tulsa, OK 74135
(918) 831-0099
Premier Aquatics
Owner - Scott Kosciolek
6125 South Sheridan Rd
Tulsa, OK 74136
(918) 497-1212
Reef Revolutions
Owner - Jason (I can't remember his last name)
6969 E. 71st St
Tulsa, OK 74133
(918) 392-1962
Ultimate Reefs
Owner - Shane Mooney (I think that's his last name)
6010 S. Memorial Dr
Tulsa, OK 74145
(918) 622-6366
What road do you think you are coming in on and I can help you with driving directions to travel to the most stores with the least amount of driving.