wow that was fast (RTN?)

[mark]

Have the tank on a controller connected to a heater and evap fan. Sample the temp every 5 sec, average for a minute then log the max/min (and average) for the hour.

over a 78 day period going from the lowest low, to highest high the difference was only 2.6°C, with the standard deviation hour to hour of 0.3°

Not thinking the temperature.