Ahmed2810

Hello, I have a question about buoyancy of concrete in water. If a submersible pump station is placed under water, and it has under it a concrete foundation to hold it in equilibrium.
How can someone calculate the minimum weight of the concrete foundation?

The pump station has a diameter: 1.6 meter
density of the water is: 1000 kg/m^3
Density of the concrete is: 2300 kg/m^3
the height of the submersed item is 2 meter under water

How thick must the concrete foundation be to counterbalance the buoyancy forces?
PS: please show me equations, and not just an explanation