CF1 Filter Cartridges for Fish Tanks for Aquarium 4 Month Service

• CF1 Replacement Media: Precision-cut filter pads sized for CF1-style internal filters, keeping water moving steadily through the mechanical and chemical filtration stages to trap debris and remove dissolved impurities from your tank.
• 8-Piece Refill Pack: Includes 4 white mechanical filter pads and 4 green activated carbon cartridges, with each cartridge lasting approximately 4 weeks depending on stocking density, so a spare is always ready for the next maintenance cycle.
• Dual Filtration System: High-density mechanical cartridges capture fish waste and uneaten food particles, while activated carbon pads absorb discolouration and odours, working together to maintain crystal clear aquarium water.
• Supports Tank Ecology: The porous structure provides surface area for beneficial nitrifying bacteria to colonise, helping convert harmful ammonia and nitrite into safer compounds and maintaining stable water parameters for fish health.
• Easy Replacement Process: Rinse the new cartridge briefly, remove the old filter media from your filter unit, insert the replacement, and restart your filter with minimal disruption to your tank's established bacterial colony.

Product description Maintaining clean, healthy water in your aquarium requires regular filter maintenance. This 8-piece replacement pack provides filter media designed for CF1-style internal filters, giving you both mechanical and chemical filtration in one convenient kit. The pack includes 4 white mechanical filter pads made from high-density polyester fibre material that physically traps suspended particles such as fish waste, excess food and plant debris. These pads form the first line of defence, removing visible cloudiness and preventing organic matter from breaking down into harmful compounds. The 4 green carbon cartridges provide chemical filtration, using activated carbon to adsorb dissolved organics, yellowing compounds and odours that mechanical filtration cannot remove. This dual-layer approach addresses both particulate and dissolved waste, creating clearer water and a healthier environment for your fish. Each cartridge lasts approximately 4 weeks under normal stocking levels. Replace the mechanical pads when water flow decreases or visible debris accumulates, and swap the carbon cartridges monthly to keep chemical filtration effective. Rinse new cartridges briefly in tank water before installation to remove loose fibres. The porous structure of these filter pads offers an additional benefit beyond filtration. The surface area supports colonies of beneficial bacteria that process toxic ammonia from fish waste into less harmful compounds, contributing to overall water quality. Suitable for both freshwater and saltwater aquarium setups. The cartridges keep their structural integrity during use and absorb water quickly for efficient filtration. Regular replacement prevents filter bypass and maintains a steady flow rate. Installation takes just a few minutes: turn off the filter, open the unit, remove the used cartridge, rinse the new one briefly, insert it into the cartridge slot, close the housing and restart the filter. Norvyn supplies the CF1 mechanical pads and carbon cartridges together as a matched 8-piece set, so the next replacement is always to hand. Directions No