pump suggestion

[abcha0s]

That is the set point I am referring to. I forget the details, but you also set the variance. The chiller is more efficient with a larger variance. I don't think it likes the constant on/off duty. They do explain it in the manual.

If your using an external temp controller, I would make sure that you don't set it to turn on and off too frequently. With the apex you can control temp to within +/- 0.2F - However I think that would be a bad idea. I think the minimum the chiller permits is +/- 0.5F

[lastlight]

Oh yeah I see. The ranco works with 1 degree F increments for the sensitivity.