So if you happen to be a Euro Reef fan in need of a calcium reactor for your calcium hungry SPS tank have no fear. The model CR3 calcium reactor is finally up for order. This guy will handle your aquarium of up to 180 gallons on an average or light load. On heavy stocked systems a 125 gallon should be about all it can handle. Euro reef is touting the “euro loc” to help you change your media faster as well as offering features that are now commonplace among the calcium reactor crowd including: ph probe holder, 3 way valve for air bleed start up. The good news is that the CR3 uses a re-circulating CO2 loop (nice!). You can pick one of these up for about $400.