Calcium Reactor

I have a dual chamber, never used calcium reactor, complete setup. It was designed and built by B-Rad (I believe that JB has the same one). I have the CO2 regulator, lab grade pH probe, mag drive pump, CO2 tank, bubble counter, and everything you could ask for. In fact, I have 2 large containers of ARM media and 2 containers of the dolomite (Magnesium). I am going to be honest, I have exactly $550 into this and am not sure I will be able to use it for lack of understanding and time. I am intimidated by them. I feel a lot better going the dosing pump route.
With all that being said, it is up for sale for offer. I will also need to purchase a dosing system for Ca and Alk (do I also need a third for Mg)? What do people like as far as that goes? What systems do you recommend? What brands, setup etc. I have an APEX to control everything.
I would trade for a complete bio-cube setup or similar or dosing system.
Thanks.

 

I know someone out there needs this reactor. I am ready to wheel and deal. Like I said, this thing is ready to rock and roll. Make an offer. No reasonable offer will be refused. I can bring it to the meeting on Saturday.