Reef Octopus OCTO OS-24A Premium Acrylic Reef Sump
The Reef Octopus OCTO Sump 24 (Model No: OS-24A) is a premium, high-density acrylic filtration basin meticulously designed to bring elite organizational architecture and structural mechanical efficiency to mid-sized marine reef aquariums. Standard glass aquariums partitioned with cheap silicone panels often suffer from structural shifting, dynamic baffle leaks, and uninspired layouts that cram essential gear together. The OS-24A completely reinvents the under-cabinet environment, establishing a beautiful 24-inch long command center engineered from solid machine-cut sheet acrylic that unifies your mechanical, biological, and chemical filtration networks into a single cohesive ecosystem.
Crafted by reef hobbyists for reef hobbyists, the OS-24A optimizes space to comfortably sit under standard cabinet framing while offering plenty of physical real estate for oversized support gear. Raw drain water entering the system drops straight into a specialized bubble-diffusing intake chamber. This compartment features a custom form-fitting acrylic cover plate that dampens crashing acoustic water noise, stops micro-bubbles from migrating into the display pump intake, and traps salt spray to protect under-cabinet electrical modules from salt creep. For mechanical filtration, the integrated 4-inch filter sock seat holds a standard media sock for heavy debris capture. For those looking to ditch manual sock cleaning loops entirely, the structural layout is precision-machined to house a direct drop-in Klir Automatic 4-Inch Fleece Filter.
The center of the sump houses an exceptionally wide protein skimmer and media reactor bay governed by an adjustable weir overflow gate. By loosening the integrated nylon thumbscrews, you can shift the operational water column height from 5.1 up to 9 inches deep on the fly. This adjustable depth allows you to lock in the exact operational immersion height required by your skimmer's venturi throat, ensuring optimal foam generation without needing to purchase an awkward aftermarket riser shelf. Flanked by an isolated return pump compartment and an expansive built-in 3-gallon freshwater top-off reservoir, this robust workhorse serves as a sleek and functional foundation for high-end reef systems.
Key Features
Industrial Structural Assembly: Heavy cast acrylic sheets are welded together by hand with seamless solvent joints to avoid warping, structural bowing, or hairline leaks over time.
Dynamic Skimmer Calibration: Eliminates fixed-baffle restrictions by giving you immediate manual control over the skimmer compartment's working water level.
Expanded ATO Storage: Includes a dedicated 3-gallon reservoir with an evaporation lid to keep your automatic top-off supply clean and nearby.
Anti-Siphon Isolation: The return pump chamber sits safely partitioned away from shifting water levels, ensuring stable automated freshwater replenishment.
Polished Finishing Bevels: All exposed edges feature precision machined profiles to prevent finger pinches or wire abrasions during regular equipment scrub-downs.
Equipment Recommendations
Compatible Protein Skimmers: Reef Octopus eSsence S-130, Classic 110SSS, Classic 150SSS, Classic 150INT, Regal 150INT, Regal 150SSS, Elite 150SSS
Compatible Return Circulation Pumps: Reef Octopus Aquatrance 2000, Aquatrance 3000, VarioS 2, VarioS 4
Compatible Automatic Mechanical Filters: Klir Fleece Filter Mat Di-4
