Originally Posted by ahave
Perhaps try spacing the magnets out further on the fan.
It's just 1 hard drive magnet, the curved kind. I played around with some ceramic magnets but they weren't strong enough.
I can get the 2 inch stir bar that I bought to spin perfectly on top of the box and inside an empty Erlenmeyer flask but as soon as I try it with a liter of water inside it gets thrown off after about 1 second and it won't work. I'm going to Home Depot to find a silicone O-ring that will fit my stir bar and see if that fixes the problem. I'll update the post a little later.