I was looking at the Tunze 7000 controller and wondered if any of you have one and how you like it? Have you used it to control a Calcium reactor? What is your experience?
Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
The controller is probably fine. Tunze makes good stuff.
You do not need a controller for a CaRx and are better off without one. If you want to get it anyway, then cool, but if it truly just for a CaRx, then learn to tune the thing by hand by counting drops, bubbles and measuring the dKh output. This is way more consistent and reliable than a pH controller turning a solenoid on and off.
If you have your mind made up, then ignore me. If you want more info on how to not use a pH controller for a CaRx, then there is a recent thread that I can link upon request.

