Vacation Bible School Cake

How did you do this? Amazing! How did you keep the fish tank from caving in the bottom layer? Was it heavy?

Water is heavy but the infamous bubble straws (3 of them) is what I used to support the tank. :)

I think this is absolutely adorable!

Great job! How long can a fish be kept alive without the the oxigen bubbles in the tank?

I didn't fill the tank higher with water to leave enough oxygen for the event. As it's a male beta they have to be by themselves so I wasn't worried about the size of the container. The cake was only on display for about 2 hours before I cut it so my beta is home safe and sound.