Introduction
The OASE FiltoSmart 100 is a compact yet powerful external filter designed to maintain clear and healthy water in your aquarium. Engineered with German precision, this multi-stage filtration system is suitable for small aquariums, including those up to 60cm in size. Its design integrates the pump within the filter body, keeping the aquarium interior free from equipment and preserving your aquascape.
This manual provides essential information for the safe and efficient installation, operation, and maintenance of your FiltoSmart 100 filter.
Safety Information
- Always disconnect the power supply before performing any maintenance or cleaning.
- Ensure all connections are secure to prevent leaks.
- Do not operate the filter if any part is damaged.
- Keep electrical components dry and away from water.
- This appliance is intended for indoor use only.
Package Contents
Verify that all components are present in the package:
- FiltoSmart 100 Main Unit
- Connection Parts
- Filter Media (Sponge and Ceramic)
- Hoses
Main Unit Dimensions: Approximately 19.2 cm (width) x 19 cm (depth) x 31.2 cm (height).

Setup Instructions
- Placement: Position the FiltoSmart 100 filter horizontally next to your aquarium. It is important to note that placing the filter below the aquarium may reduce its output performance.
- Hose Connection: Connect the intake and output hoses to the designated ports on the filter head. Ensure all connections are tight and secure to prevent leaks.
- Aquarium Connections: Install the intake and output pipes within your aquarium. The intake pipe should be positioned to draw water effectively, and the output pipe to return filtered water, creating adequate circulation.
- Priming: Before connecting to power, prime the filter by filling it with water. Follow the specific priming instructions provided in the detailed manual (not fully available here, but generally involves opening valves and allowing water to flow in by gravity or using a priming button if available).
- Power Connection: Once the filter is primed and all connections are secure, connect the power plug to an electrical outlet.

Operating Instructions
After successful setup, the FiltoSmart 100 will begin circulating and filtering your aquarium water. The multi-stage filtration system, utilizing sponge and ceramic media, ensures effective mechanical and biological filtration.
- Initial Operation: Observe the water flow and check for any leaks immediately after starting the filter.
- Flow Adjustment: If your model includes flow control valves, adjust them to achieve the desired water circulation for your aquarium inhabitants.
- Continuous Filtration: The filter is designed for continuous operation to maintain water quality.

Maintenance
Regular maintenance is crucial for the optimal performance and longevity of your OASE FiltoSmart 100 filter. Always disconnect power before maintenance.
- Filter Media Cleaning/Replacement: Periodically inspect the filter media (sponge and ceramic). Rinse mechanical filter media (sponges) in old aquarium water to preserve beneficial bacteria. Replace media as needed, typically every few months depending on aquarium load.
- Hose Cleaning: Over time, hoses can accumulate debris, reducing flow. Clean hoses regularly using a brush designed for aquarium hoses.
- Impeller Maintenance: Check the pump impeller for blockages or wear during filter cleaning. Clean any debris from the impeller and its housing.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Reduced Water Flow | Clogged filter media or hoses; air in the system; impeller blockage. | Clean or replace filter media. Clean hoses. Remove air by adjusting intake/output valves or re-priming. Check and clean impeller. |
| Unusual Noise | Air trapped inside the filter; impeller issue; filter not placed horizontally. | Remove trapped air by gently tilting the filter or adjusting valves. Check and clean impeller. Ensure filter is placed horizontally as recommended. |
| Water Leakage | Loose hose connections; damaged O-rings or seals. | Tighten all hose connections. Inspect and replace any damaged O-rings or seals. |
| Filter Not Starting | No power supply; impeller blockage; unit not primed. | Check power connection. Clean impeller. Ensure the filter is properly primed with water. |
Specifications
- Brand: OASE
- Model: FiltoSmart 100 (88353)
- Suitable Aquarium Size: Up to 60cm standard aquariums
- Pet Type: Tropical fish, ornamental fish
- Main Unit Dimensions (W x D x H): Approximately 19.2 cm x 19 cm x 31.2 cm
- Max Temperature Rating: 28 degrees Celsius
- Max Supported TDS Level: 300 ppm
- Battery Use: No
Warranty and Support
The OASE FiltoSmart 100 comes with a 3-year warranty when purchased directly from OASE Japan G.K. Please note that this warranty may not be applicable if purchased from other third-party sellers.
For further assistance, technical support, or warranty claims, please contact OASE customer service or visit the official OASE store:





