I've looked through the forums, and while I've got a pretty good idea that the Herpstat and Helix are good proportional thermostats, and that Johnson and Ranco are good on/off switchy kinds--I'm left with the question:

When heating a single tub with flexwatt, what is the best type of thermostat to use? Proportional or on/off?

And if you think proportional, which would you prefer? Herpstat or Helix? And which is the easiest to use for a herping newbie?

--Azure