fish tank size

As there is a feedback loop, the inital object could be pretty simple (given that it has continuous distortion when someone is present).

With silicone thickener, maybe I can just brush on silicone around a model instead of making a mold? However, it will have a pretty rough surface this way. Alternatively, maybe i can brush on silicone inside the mold.

Another problem currently is how i will distort it in other directions than straight up. If i use a PVC tube like earlier, it obstructs the view from the side. I could maybe use strings instead, but even the tube is bent when the motor is pulling it. Also i guess when the string is wrapped around a tube, there will be more resistance / less distortion on the object. Maybe look into tension force?

Maybe i can use an acryl tube, similar to the aluminum one from the previous model?

Motor position. Ideally I would have as many motors as possible, not sure if eight is possible. At least four would be nice, one for each direction.

28x32 and 28x28 fish tank.

I prefer the taller one. For some reason the perfectly square one seems like its too short. With a acrylic aquarium thickness calculatur, it says i need a minimum thickness of 6mm with a tank that is 28x32.