Reef Octopus's Classic Series has been a hobby staple for years because it does one thing well: fixed-speed, proven skimming without unnecessary complexity. The Classic In-Sump line — 110-INT, 150-INT, and 200-INT — covers everything from entry-level sumps to well-stocked large tanks.
Why the Classic Series Endures
Not every reef keeper wants — or needs — a DC-controllable pump with app scheduling. The Classic line runs a reliable fixed-speed pump in a proven cone body, keeping the design simple, well-understood, and generally more affordable than DC-controllable equivalents.
Choosing a Size
- Classic 110-INT — the in-sump entry point to the Classic Series, sized for smaller sump-based systems.
- Classic 150-INT — steps up to aquariums as large as roughly 210 gallons with a taller cone body.
- Classic 200-INT — the large-tank option in the Classic in-sump lineup, built for well-stocked reef and mixed saltwater tanks.
Setup Tips
- Confirm sump compartment dimensions before ordering, since in-sump skimmers need adequate depth and footprint to sit correctly.
- Break in gradually — new skimmers commonly run wet or overflow with microbubbles for the first week or two.
- Pair with a Waste Collector as insurance against skimmate overflow during that break-in period or after a bioload change.
The Reef Octopus Classic In-Sump line is available at Marine Concept Supply across all sizes — order online or pick up at our shop in Wheeling, IL. Shop 110-INT, 150-INT, or 200-INT, and browse more protein skimmers.
