Has anyone built and used this reactor before? If so how is it's performance and is the set up easy to use? I have never used a ca reactor but want to get into SPS and looking for a good reactor. I'm sure I could build a DIY reactor just wondering if this is a good one or if anyone else may have a lead to a different DIY reactors. Also I know that I'm going to have to dose with Kalk, wondering if anyone has any idea's on a Kalk reactor. If I don't do a DIY anyone have ideas on a good and reasonable priced Ca and Kalk reactor. Need some help and leads, thanks. Oh and also wondering if the bubble counter is necessary and if so how to build one also.