I'm not speaking for Bob. I'm an intruder here.

My concern would be the temperature swings over the course of an hour rather
than the course of a year! The term is hysteresis and typical cheap
thermostat mechanisms cause a lot of it. The heater doesn't come on until
the temperature is 4 degrees too low and then it doesn't quit until the
temperature is 4 degrees above the setpoint. All in all in an acceptable
range, perhaps, but how fast do temperatures swing on a tropical reef? How
fast in a 6 gal. nanoreef?

I don't know the answer to that question but I would like to!
I *suspect* that temperature swing (hysteresis!) in a nanoreef can be rather
extraodinary and stressful to the inhabitants. A serious thermostat control
may be of benefit.

But then - I don't know ;-)
Thomas Bartkus



You are correct. It's the temperature swings in a few hours that bother
me (here in tidewater Va.) I use an aquacontroller jr so the thermostat isn't
much of a problem. The problem is when the apt gets up to 80 degrees and the
tank pushes 85. I have the hood fans and a sump fan tied into the
aquacontroler but they can't deal with that much heat. Guess I'll just have to
keep the AC on in the apt until I can spring for the chiller.

Bob