Some reef keepers want the proven reliability of a fixed-speed calcium reactor without stepping up to full DC control, and the SRO calcium reactor line delivers exactly that across three chamber sizes. The SRO CR1000, CR3000D, and CR5000D span single and dual-chamber designs.
Why Fixed-Speed SRO Calcium Reactors
A fixed-speed reverse-flow reactor is simpler to set and forget than a variable-speed unit — dial in your CO2 injection rate once, monitor effluent pH periodically, and the reactor handles the rest without ongoing pump-speed adjustments.
Choosing a Model
- SRO CR1000 — the entry point to the SRO fixed-speed calcium reactor line, a 4-inch chamber using a high-performance reverse-flow design.
- SRO CR3000D — a 7-inch dual-chamber design running two chambers in series for more complete media dissolution than a single pass.
- SRO CR5000D — the largest fixed-speed calcium reactor in the SRO line, running two 8-inch chambers in series.
Setup Tips
- Start CO2 injection conservatively and monitor effluent pH before increasing.
- Dual-chamber models give media more contact time per pass, useful for demanding reef systems with high calcium consumption.
- Check media level and refill proactively rather than letting the chamber run low.
The Reef Octopus SRO Calcium Reactor line is available at Marine Concept Supply — order online or pick up at our shop in Wheeling, IL. Shop SRO CR1000, SRO CR3000D, or SRO CR5000D, and browse more reactors.
