I am considering getting a magnetic stirrer for mixing dark room chemicals. I have checked them out on Evilbay and there are two kinds. One justs stirs and the other heats and stirs. Obviously the one that also heats would be great if you start with room temp distilled water, but I have a microwave oven heater for that. I guess what I would like is your experience and the model that you use or recommend. I think that a 2lt capacity would be OK, but if it could handle a bucket that would allow a 1gal - 5ltr mix would be great too. Thanks for any help you can give me in my decision.