do we need to make a reservation to get into Aquatica on Sunday?

No

Yes everyday

They say you do if you look online so we made them (went last sunday). They never checked and it was slammed packed that day.

Yes for any day

Sort of, but we did it on the place, Sunday overcrowded, mid-week better

Yup.

You do, but they don't check and there were a ton of people last Sunday so I'm not sure they actually check.

Yes