Thinking about getting one ... What do I need?

[fluffpuffgerbil]

I am afraid this is a case of you get what you pay for. I guess the hydrofarm is ok but the probes are terribly inaccurate I do instrument calibration in my work and I was asked to test 3 hydrofarms they all read differently buy one degree and one two degrees and the lowest one is is still too high by 1 degree. If you go that route make sure you have an accurate thermometer.

I'm getting a Hydrofarm T-Stat(Should be here today or tomorrow) finally, and though I trust you that they do fluctuate, but the hotside temp requirements are 88-92*F, right? So if you set it at 90, it should fluctuate between those two temperatures, right?