Not every tank has room for a sump, but that doesn't mean skimming is off the table entirely. The Sicce Shark Internal Skimmer sits inside the display, giving sump-free tanks real protein skimming, in two capacities.
Why an Internal Skimmer
An internal skimmer draws water, processes it through a reaction chamber, and returns it — all from inside the display tank itself, without needing a sump or external plumbing. It's a compact way to add real skimming to a setup that was never built around a sump.
Choosing a Size
- Shark Internal Skimmer 150 — a compact protein skimmer that sits inside the tank, suited for smaller setups where an external sump-based skimmer isn't an option.
- Shark Internal Skimmer 300 — steps up capacity from the 150 in the same compact internal format, for tanks that need more skimming without a sump.
Setup Tips
- Position away from the display's main viewing angle where possible, since internal equipment is visible in the tank.
- Break in gradually like any new skimmer, expecting some microbubble overflow in the first week or two.
- Empty the collection cup regularly to avoid skimmate draining back into the display.
The Sicce Shark Internal Skimmer is available at Marine Concept Supply in both sizes — order online or pick up at our shop in Wheeling, IL. Shop the 150 or 300, and browse more protein skimmers.

