Bio-Foam Filter Blocks for Fluval 206/306 and 207/307 filters, 2-pack

Bio-Foam filter blocks are specially designed for high-performance Fluval 206/306 and 207/307 external filters, ensuring effective mechanical filtration by trapping large particles and debris.

Key features:

• Provide mechanical filtration;
• Effectively trap most waste and debris;
• Feature a complex foam structure that maintains uniform water flow and naturally promotes the proliferation of beneficial bacteria;
• Are custom-fitted to prevent debris from passing through;
• Enhance the biological filtration process;
• Are available in a convenient 2-pack;
• Should be replaced every 6 months;
• Suitable for both freshwater and saltwater aquariums.