Another observation: When I refilled the Grizzly, it was about 100 degrees out, and the water out of the tap was 80. I turned on the chiller around 6pm, and set it to 45 degrees on "Boost" and the water was 45 at 6am. So this little chiller exceeds my expectations, and it is quite possible a 1/10hp unit would have done the trick.
Next time I change the water, I'll do it in the morning, and chart the temperature drop hourly. This time, though, I ran it for a few hours with the chiller off to do leak testing. That's how I found the bulkhead leak. The sheer amount of condensation in this Texas weather makes small leak detection impossible.
