So I'm kinda getting tired of mixing stuff for dosing and am wanting to go back to a calcium reactor.  Willing to trade my dosing setup as partial payment as well 
 
Anyhow, I am looking for a reactor suitable for 200ish gallons with a small footprint.  Let me know what you have.  Coralife need not apply.
Thanks,
-Harvey
Oh, forgot to mention that I would like something with a built in bubble counter as well.