For those who run kalkreactors and calcium reactors..

[Aquattro]

Well, kalk will add both Ca and Alk, as will a Ca reactor. Tony, on my 150g, once I set the parameters where I wanted them using Kent A&B, my Ca reactor was able to maintain those levels all the time. I never needed both, and that was with a lot of SPS growth. If your Ca reactor is sized to your tank/bio-load, maybe just try running that AFTER you set the right levels.