Note: I have very little Ca demand to speak of yet, but I am convinced that I will continue using the DIY Kalk Reactor in combination with a non-aggresive Ca Reactor. Readings today after about 48hrs of using this combination are:

Ca = 500
DkH = 10
PH = 8.2 (Late evening reading)

Best balanced parameters I have ever had in ANY tank!

We will see if it holds, and if I can maintain it as the load increases?

Tim, let's see those monster KW Reactor pics!