So when all the parts were painted, I could now put the wood into the water and glue the lower part to the tank, so it would not float.
When it dried, I was able to test it with water. The visible electronic parts, are going to be covered for the exhibition.
What I have learned from this test:
-I still need to create a bank to make the waves grow (Tsunami like)
-I need to seal the tank more, because it can not handle that much weight of the water, and starts leaking.