Any suggestions for an Inexpensive Calcium Reactor?

There was a guy in the for sale forum that is selling home made Ca reactors. Saw one first hand over the weekend very nice looking.
 
Chuck,

Bite the bullet and get a new one or a good dependable used one like a Precison Marine, MRC, and etc.

The big part of the reactor cost is the CO2 tank, Regulator,Feed Pump, Media, and PH meter.
 
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