Hi all. I've been dosing Kalk for a very long time. It has worked well and I've developed a pretty bulletproof system for dosing the proper amount. SPS growth and population are using ca & alk faster than I can reasonably supplement it with my Kalk system. That's a great thing, but now I have to do something else. I've made a deal for a way oversized calcium reactor. I've still got some components to buy, but over the next month or so I want to get it installed and dialed in. I understand the basics... in theory. So, what do I need to know? What mistakes are common? What media is best? How many use magnesium media? Etc.? Any advice is appreciated.