Description
Reef Octopus OCTO OS-36A Premium Acrylic Reef Sump
The Reef Octopus OCTO Sump 36 (Model No: OS-36A) is the flagship, large-capacity acrylic filtration basin meticulously designed to bring elite organizational architecture and heavy mechanical capacity to large-scale 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-36A completely reinvents the under-cabinet environment, establishing a beautiful 36-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-36A optimizes space to comfortably sit under large 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 driven by dual 1-inch bulkhead inputs. 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 filter sock setup 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 6.6-gallon freshwater top-off reservoir, this robust workhorse serves as a sleek and functional foundation for high-end reef systems.
Key Features
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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.
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Dynamic Skimmer Calibration: Eliminates fixed-baffle restrictions by giving you immediate manual control over the skimmer compartment's working water level.
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Massive ATO Storage: Includes a dedicated 6.6-gallon reservoir with an evaporation lid to keep your automatic top-off supply clean and nearby.
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Anti-Siphon Isolation: The return pump chamber sits safely partitioned away from shifting water levels, ensuring stable automated freshwater replenishment.
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Polished Finishing Bevels: All exposed edges feature precision machined profiles to prevent finger pinches or wire abrasions during regular equipment scrub-downs.
Equipment Recommendations
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Compatible Protein Skimmers: Reef Octopus Classic 200INT, Classic 202-S, SRO 3000INT, SRO 5000SSS, Regal 150INT, Regal 150SSS, Regal 200INT, Regal 200SSS, Regal 250SSS, Elite 150INT, Elite 150SSS, Elite 200INT, Elite 200SSS, Elite 220SSS
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Compatible Return Circulation Pumps: Reef Octopus VarioS 4, VarioS 6
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Compatible Automatic Mechanical Filters: Klir Fleece Filter Mat Di-4