Product description What it does and why you need it Removes impurities and turbidity using activated carbon in a solid, non-powdery cube form, preventing black or muddy water without releasing carbon dust into the tank. Porous honeycomb structure adsorbs pollutants, odors and suspended particles to keep aquarium water clear and healthy for fish and plants. Designed to deliver consistent filtration performance without frequent clean-up or messy carbon replacement. Key features Material: Activated carbon formed into a solid, porous honeycomb cube (non-powdery) for reliable adsorption without powder fallout. Shape & placement: Three-dimensional cube with a unique configuration for neat, stable placement in filters or housings. Performance: Honeycomb design maximizes contact area to trap impurities and improve water clarity. Compatibility: Suitable for use in any aquarium filtration system where a compact carbon cube can be positioned near the water inlet or pump. Maintenance: Rinse or replace every 3–6 months to maintain effectiveness. Do not place the cube with the grid filter facing downwards. How to use for best results Install the cube near the aquarium water pump, positioned at or into the water inlet so water flows through the honeycomb structure. If placed away from the inlet, flow may be insufficient and the cube can become blocked. Rinse before first use to remove loose particles, then follow a 3–6 month replacement or rinsing schedule depending on bioload and water quality. Avoid compressing or crushing the cube; its solid, slightly fragile structure is normal and does not reduce performance. Practical applications Home freshwater tanks: Place in the filter housing near the inlet to reduce yellowing and turbidity caused by dissolved organics. Planted aquariums: Use to control dissolved impurities and maintain water clarity without contaminating substrate or plant life with carbon dust. Public displays or office tanks: Reliable, neat placement and low maintenance keep display water clear without frequent cartridge changes or mess. Notes and precautions Ensure the cube is positioned so water flows through it; poor placement can block filtration. Do not place the cube with the grid filter facing downward. Replace or rinse the cube every 3–6 months based on tank conditions to avoid reduced filter effectiveness.