Hi all. I'm looking to mess with ferro fluid but I'm wondering exactly what kind of magnet I'm going to want. From what I've looked up anything under 3000 gauss and I might as well get a rare earth magnet. So obviously we move to electromagnets. Basically what I'm looking for is help to create an electro magnet with these three criteria maximum gauss, minimum effort, and moderate safety. I'd rather not have it get hot and burn myself.?