Large calcium reactor, the GEO624 is 6" diameter and 24" high. It holds a metric sh*t ton of media (ha!). I have had this on my 300 SPS reef for a couple years and it has never been an issue. Will support a much larger tank in fact. I'm including everything you need to run a calcium reactor. Located in Plymouth, MI. Pick-up only.

GEO624 Reactor & all plumbing
blow-off chamber (small Knopp calcium reactor)
pH probe (Apex)
PanWorld recirculating pump
CO2art dual stage regulator
10# CO2 tank
ARM coarse media in reactor (full)
needle valve for effluent control

$400 for everything.

For questions and pics, text me at 81zero-8seven5-0001.