Two-piece fish corner/angle filter or accessory by Hagen KOTNIK (model 931)

Two-piece fish corner/angle filter or accessory by Hagen KOTNIK (model 931) is a non-electrical aquarium component designed to fit into aquarium corners and angles. Intended as a modular fitting, the two-piece design allows for easy placement and stable integration with tank walls and accessories. This accessory is suitable for organizing equipment or guiding water flow in corner areas without adding powered filtration, and it supports aquarium layout and maintenance tasks for both hobbyists and professionals.

Advantages

The two-piece construction provides flexibility during installation, enabling the accessory to adapt to different corner geometries and simplify attachment to tank panes or structural elements. Made under the Hagen brand, the component is intended to offer reliable mechanical performance for non-powered uses and to help maintain a neat and functional aquarium interior. Its compact form factor reduces visual clutter in corner zones while allowing other filtration or aeration devices to be positioned effectively.

Suitable for

• Corner mounting of aquarium accessories and fittings
• Organizing tubing, air lines or small in-tank components
• Creating discreet attachment points for decorations or partitions
• Use in freshwater and saltwater aquaria where non-electrical fittings are preferred

Key specifications

• Two-piece modular design for corner or angle installation
• Non-electrical accessory intended for mechanical fitting and organization
• Compact dimensions suitable for placement in aquarium corners
• Compatible with standard aquarium panes and structural fittings

How to use

Position the two-piece accessory in the target corner of the aquarium and assemble the parts so they sit flush against the tank walls. Ensure any sealing surfaces are clean and free of debris before fitting; tighten or secure the pieces according to the accessory geometry so the unit remains stable without strain on tank silicone or seams. Use the accessory to guide small tubing, support lightweight decorations, or create a mounting point for other non-powered components. Regularly inspect the assembly as part of routine aquarium maintenance to confirm it remains correctly seated and free from biological buildup.

Usage recommendations

Do not use this accessory as a replacement for structural or load-bearing elements; avoid attaching heavy items that could stress aquarium walls. For installations near electrical equipment, ensure cables and powered devices are routed and secured separately. Periodic cleaning and inspection will help maintain fit and hygiene—remove the accessory briefly during deep cleaning if necessary.