All depends on you. They have different shows going on throughout the day. If you are just walking through looking at the displays you could do it in an hour. If you stop to look at things and interact with the touch tanks and shows you could easily spend 3-4 hours there.
4 hours, the aquarium has a schedule of events of 15 to 20 minutes to see all the attractions of it. Following the schedule you can cover all in about 4 or 5 hours. Tickets can be purchased online a day in advance and can be paid online with an international card and confirm the reservation by phone, saving time on admission.
More or less 4 hours, because some events have time to start.
About 4 hours
It's not the biggest aquarium so a half day would definitely be enough
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