Hey so after now having 2 tank set-ups, it is getting more and more tempting to switch to a small 3 high rack systems with tubs, but I had some questions about them that I don't understand. How does the heating work? Do all rack systems I see come with the heating installed? Is there no need to UTH's or Lamps? And also thermostats still seem to confuse me. Most of the ones I see only have 1 probe, but can control like 3 devices, how is it possible to control, say a UTH and 2 lamps, if you can only have one heat source probed? and do these thermostats turn the UTH/lamps off and on as needed? Sorry for all the noobie-ish questions I just can't figure it out