the little bar magnets i use are N45. i still use them pulling to each other through the bottle.
but wait! there are other wasy to use magnets and produce different magnetic fields with different results.
your device sounds perfect for some experimentation. it would be interesting to set up the magnets so that the are repelling each other. also, a straight negative pole exposure and a straight positive pole exposure. negative would be more calming and organizing. positive would be more lively and active.
your mileage may vary but there is work to be done in this area if one is interested.