The Disney aquarium in Epcot is 150$ per person, one tank.
Lasts a minimum of 4 hours.
They give you a backstage tour, a safety check that you know your stuff. Padi OW minimum cert.
Bonus, you get to interact with the guests on the other side of the glass.
Minus, you *cannot* use your own gear, not even your own mask.
I did this dive less than two weeks ago, and would like to ask you where you got your information...
This link will verify most of the facts that I am about to state. The rest, you may assume, is my humble opinion...
Epcot DiveQuest | Walt Disney World Resort
The Epcot aquarium dive is actually set up as a NAUI program, and open water certification is the minimum certification level. PADI OW being the "minimum" in that category is a subject I will not address further for now because I do not have any animosity against any particular certifying agency.
The entire "experience" lasted approximately three hours by the time we took the tour, attended the briefing and signed waivers, suited up, dove, and then showered afterwards. We met up at about 4:30pm and were on our way to dinner by about 7:45pm.
The dive itself consisted of 40 minutes in the water. The staff was standing by to replace anyone's single tank who ran low on air in order to let them finish their dive. No one in our group needed another tank.
We were allowed to use our own masks and dive watches.
All things considered, it was a great time. Their gear was in good shape, and well-maintained. The staff there were super-friendly and had everything set up to run very efficiently. The aquarium was about 25'deep, a little over 200' across, and had plenty of critters to look at on both sides of the glass. It was the first time I have been able to get my wife to dive with me in almost two years, so for me it was definitely worth what they charged.