cr500_af;542480 wrote: +1 to what Jenn said regarding drilled vs HOB overflow. Reading between the lines, it sounds like the store employee may have been referring to an undrilled tank, and suggesting that a reef-ready tank would be less prone to flood.
And as Smoothie said, I'd also run from Hydor Theo heaters as well. I had one heat my water to 92.9 while set on 79... and it was not stuck; the thermostat was that far off. Hydor said there was nothing wrong with it! (I had sent them an email as a courtesy just so it could be one more issue that may someday lead to a redesign. I didn't ask for repair or replacement, since I had bought it used).
I would heartily recommend running a controller on the heater as a failsafe. Either a Ranco temp controller, or spend a little more and get a Reefkeeper Lite. It will make you wonder how you ever got along without a controller, and it's only $99.
