check out the Neptune forum over at RC. Some great information over there. I kept mine really simple so I don't have any great tips. The only thing I would say is try not to have the heater and chiller constantly butting heads. Do you know what I mean? I like to leave some space in-between when the heater would go on vs. when the chiller goes on. I've seen some people set theirs up so that if the temp hits 80 the heater switches off, and if the tank hits 80.5 the chiller comes on. Then the chiller shuts off at 80, but now the heater is already switching on. That kind of thing. Leave a few degrees in there. JMHO, but I don't think a few degrees temp. swing is a problem- and it's less energy cost and less wear and tear on the equipment when heater and chiller aren't constantly going on and off...