Can someone explain how you set up a kalk reactor? I am planning my system out and am a little unsure of how to do it. I have a freshwater tank that may or may not have the capability of gravity feeding into the kalk reactor. The reactor has the capability to gravity feed into my sump. I am going to put a float switch in my sump return to control the flow from the kalk reactor into the sump, at least until I can get a peristaltic pump at a later date. Am I confused? Does it already sound like I know what to do? Thanks for the help.