I have a calcium reactor up for sale from my teardown.......it is a Vortex RX-C 6D......it was run for about 5 months..so its like new.....it will be cleaned up and put back in its original box....will also include a daul set of Reef Fanatic O2 gauges and solenoid and a standard grade PH probe that never got dry.....asking $375 shipped.....will post pics tomorrow after i get it cleaned up
