The Reef Octopus SRO CR1000 4-Inch Calcium Reactor is the entry point to the SRO fixed-speed calcium reactor line, using a high-performance reverse-flow design and a dependable Water Blaster recirculation pump with silicone-carbide shaft and bearings for long-term reliability. Body: 4-inch reaction chamber Pump: Water Blaster recirculation pump, reverse-flow design, 2-year pump warranty Monitoring: pH probe holder in the first chamber, built-in bubble counter for CO2 drip rate Like other SRO-series equipment, this reactor uses a fixed-speed pump rather than the VarioS line's variable-speed DC pump — a straightforward, lower-cost option for hobbyists who don't need adjustable circulation speed.Compatible replacement parts: Water Blaster pump kits for the CR1000.
