Awesome!
I kept meaning to build one. Like everyone else, I have all the acrylic sitting around, etc...then got lazy/busy. Then Bonnie was selling her K2R reactor so I bought it off her. The result is this...waiting for me to build a reactor resulted in me never putting a reactor on the tank. Buying one...boom, it's up and running! I had an eBay reactor years ago which ended up really compacting the media and eventually leaking. I'm sure I could have "fixed it" if I wanted to, but I screwed it up by messing with it too many times.
So huge props on just deciding to make a CA Reactor and just doing it! Great work! Show us a pic of it working!
I use a maxijet for my kalk mixer, I just smear some silicon around the impeller housing...doesn't leak!
V