[JshWright]

Water is dipolar (the oxygen atom 'pulls' harder on the electrons it's sharing with the hydrogen atoms, so the middle is negative and the ends are positive). It can be controlled by both electrostatic and magnetic fields, no salt needed.

[CamperBob2]

Electrostatic, sure. You can deflect a stream of water from a faucet by holding a comb near it. But magnetic?