Hi Steve. I may sell my brand new, never used Geo CR612 reactor.
http://geosreef.com/index.php/products/calcium-reactors
Even if I save it for my 50g sps tank, its likely overkill. I may get George to make me a hang on design. Paid around $400 C for it. Will sell for $350. Also have brand new 5g co2 tank from JL. Asking $100 which is about $20 under its cost. Milwaukee used gauges for $75
So asking $525 for it all. Will take $500 and buyer pays shipping. Could use Greyhound.
Best reactor on the market, IMO.