Shark Skimmer 300 Internal Filter - Sicce
Goes well with:
Shark SKIMMER 300
The Shark SKIMMER 300 is a state-of-the-art internal skimmer designed for seamless integration into marine biotopes. Utilizing the latest advancements in reefing technology, it’s ideal for aquariums up to 300 liters. With its compact design and low energy consumption, this skimmer offers powerful, quiet, and efficient performance.
Key Features:
- Advanced Skimming: Instant skimming with diffusion, enhanced by counter-current skimming and adjustable water entrance.
- Sleek and Discreet: The compact, unobtrusive design is ozone compatible and features an opaque body to prevent algae growth by protecting internal parts from light exposure.
- Effortless Maintenance: Includes a self-cleaning impeller optimized for high efficiency, with easy dismounting and an included cleaning brush.
Technical Specifications:
- Power Consumption: 6 watts
- Flow Rate: 180 l/h (45 US gph)
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Aquarium Compatibility:
- Low bioload: up to 300 liters (80 US gallons)
- Medium bioload: up to 200 liters (50 US gallons)
- High bioload: up to 100 liters (25 US gallons)
- Immersion Depth: 130mm to 150mm (5" to 6")
- Cable Length: 2.2 meters (7.55 feet)
- Dimensions: 83mm (3.3") x 125mm (4.9") x 243mm (9.6")

Overview
Compact. Efficient. Discreet.
The Shark Skimmer 300 delivers internal protein skimming with a low profile and low power draw, built for marine aquariums up to 300 liters.
Counter-Current Skimming
- Adjustable water entrance optimizes contact time
- Counter-current design improves organic waste extraction
- Produces skimmate immediately from startup
Low-Maintenance Design
- Self-cleaning impeller reduces manual servicing frequency
- Tool-free disassembly for straightforward cleaning
- Cleaning brush included in the box
Practical Build Details
- Opaque body blocks light to prevent internal algae growth
- Ozone compatible for hobbyists using ozone injection
- 6-watt power consumption for continuous, low-cost operation
Features
Retail Box and Specs
The product packaging lists key specifications for the Shark Skimmer 300, including flow rate, power consumption, and aquarium compatibility. Bioload-based tank size ratings are printed on the box for quick reference at point of purchase.
Key Features Diagram on Packaging
The rear panel of the box uses a labeled diagram to highlight design features including the opaque housing, adjustable water entrance, and ozone compatibility. This reinforces the core differentiators of the unit at a glance.
Callout Diagram of Major Features
A labeled product diagram identifies the primary functional zones of the Shark Skimmer 300, including the skimmate collection cup, water entrance adjustment, and mounting bracket. The layout communicates how the unit assembles and positions in the tank.
Impeller and MCS System Detail
This annotated view highlights the self-cleaning impeller and Sicce's MCS (Microbubble Control System) integration, showing how the impeller design supports efficient air-water mixing. The opaque body panels are also visible, illustrating the light-blocking construction.
Internal Water Flow Cross-Section
A cross-section diagram traces the water path through the skimmer body, illustrating the counter-current flow dynamic and how air and water interact within the reaction chamber. This view shows why contact time is extended relative to a simple flow-through design.
Installed in a Reef Aquarium
The skimmer is shown mounted inside a running saltwater reef tank, demonstrating its compact footprint alongside live coral and fish. The image confirms the unit's ability to sit unobtrusively within a display system rather than requiring a dedicated sump compartment.
Model Comparison: 150 vs. 300
A side-by-side specification chart compares the Shark Skimmer 150 and 300 across key parameters including flow rate, power draw, aquarium capacity, and physical dimensions. This allows buyers to select the correct model based on their tank size and stocking level.
Specifications
SHARK SKIMMER 300
- Power Consumption
- 6 W
- Flow Rate
- 180 l/h (45 US gph)
- Aquarium Compatibility — Low Bioload
- Up to 300 L (80 US gal)
- Aquarium Compatibility — Medium Bioload
- Up to 200 L (50 US gal)
- Aquarium Compatibility — High Bioload
- Up to 100 L (25 US gal)
- Immersion Depth
- 130–150 mm (5"–6")
- Cable Length
- 2.2 m (7.55 ft)
- Dimensions (W × D × H)
- 83 × 125 × 243 mm (3.3" × 4.9" × 9.6")