Enhance your aquarium's filtration system with this comprehensive Bio Foam Value Pack designed specifically for Fluval 306/307 canister filters. This bundle includes 12 foam filter elements: 4standard Bio-Foam, 4 Bio-Foam+, and 4 Bio-Foam Max pieces. Each foam type offers different levels of mechanical and biological filtration to help maintain crystal-clear water and optimal conditions for your aquatic life. The varying densities of foam work together to trap debris while providing ideal surfaces for beneficial bacteria to colonize. The standard Bio-Foam catches larger particles, while the Bio-Foam+ and Bio-Foam Max offer progressively finer filtration. This value pack ensures you have plenty of replacement media on hand, making it convenient to maintain your filter's performance through regular maintenance cycles.306 and 307 canister filter models.