Quote Originally Posted by Matthew Cherry View Post
I already have an aquarium chiller that (I think) has a built in pump. I assume I can plumb it into the jobo (both intake and overflow as the chiller is a closed, recirculating system) and just not turn it on when doing color work?
The Jobo will open the water inlet from time to time when the measured temperature diverges from the target temperature so while doing colour work if the water falls from the chiller by gravity the best option is to close the tap bringing water to the water inlet, or just disconnect the water inlet entirely, because this intake of cold water will actually amplify the temperature variations in my experience.