I have a Koraline Calcium Reactor, that I got many years ago. I could never get it to work, without crashing my pH. I’m being advised to get a separate additional Reaction Chamber and a Lift Pump. Before I used Gravity to feed the water to the Reactor, and into my return chamber in my sump, so I don’t understand why a Lift Pump would be needed. Also any plans, ideas on a DIY, Second Reaction Chamber? Don’t want to chase good money, after more failure of a Reactor.