Calcium Reactor, Second Reactor Chamber and Lift Pump?

[SteveMM62Reef]

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.

 

[PeterC99]

What media did you use previously? I switched from aragonite to TLF reborn and was able to significantly increase the pH to melt the media ( (as you can see in the screenshot below). Also the second chamber is a great idea.