Ditto......
I just got my first batch of DIY 2-part stuff yesterday. I'm going to mix it up tonight.
I actually built the DIY calcium reactor through the MACO class a few years ago. I keep telling myself that, one day, I'll get around to getting the pumps, tanks, regulator, pH controller...blah..blah...blah. Too much $$$ if you ask me (especially when you figure that 2-part solution is cheap to make when you make it yourself).
My suggestion, save your money and don't get the reactor. Get some good quality test kits and check out how to make your own 2-part solution.
Thanks
Eboman