Hi, of course that helps. Many thanks for this. Made a good progress with that today. The custom depth method from Looman worked really good.
The next things i try are buoyancy, water reaction with objects and a wave-height depending on the distance to the floor. It seems like especially buyoancy is heavy, so im thankful for any tips regarding this.
I just want to learn that, so it wouldn`t be good for me to use finished things 
Kind regards!