In hydrostatic equilibrium, the pressure at a certain depth in a fluid is solely determined by the weight of the fluid above it, independent of the fluid's density.

The statement is incorrect. In hydrostatic equilibrium the pressure at a depth \(h\) is given by \(P = P_0 + \rho g h\), where \(\rho\) is the fluid density, \(g\) the gravitational acceleration, and \(P_0\) the pressure at the surface. Thus the pressure depends on both the depth and the density of the fluid; a denser fluid exerts more pressure at the same depth. For example, a 10‑meter column of water (density 1000 kg/m³) creates a pressure of about 1 MPa at the bottom, while a 10‑meter column of mercury (density 13 600 kg/m³) creates roughly 13. 6 MPa, showing the dependence on density.