Fluval 306/406, 307/407 Bio-Foam+ Size:2-Pack Stix are the perfect size

Stix are the perfect size for small dogs (and cats) that need big

Dried Lactobacillus Acidophilus Fermentation Product

Rice Flour

0% Crude Fiber (Max) 2

cobalt carbonate

Fluval 306/406, 307/407 Bio-Foam+ Size:2-Pack Stix are the perfect sizeDesigned specifically for Fluval 306 406, 406 407 canister filters, Bio Foam+ performs double duty as both an effective mechanical and biological media. Features Mechanical Biological filter media Dense structure ideal for trapping small particles Intricate, porous network provides vast surface area to facilitate growth of beneficial bacteria Helps create clean and healthy water conditions for fish and plants Convenient 2 pack format Specs For filter