Lee's Aquarium & Pet Products Under Gravel Filter, Premium Reptile Fluval BioMax rings have a

Fluval BioMax rings have a complex porous design that ensures optimal contact time as water passes by for efficient biological filtration and beneficial bacteria growth

Thiamine Mononitrate (source of Vitamin B1)

Replacement blades also available

cat or any other pet

"*Rapidly absorbs water and takes on a soft

Lee's Aquarium & Pet Products Under Gravel Filter, Premium Reptile Fluval BioMax rings have aThis biological filter has a multi level plate design. The larger plate sizes reduce the number of plates required. The added strength of the UGF plates makes this filter most preferred by saltwater aquarist. The molded gravel guards eliminate the possibility of gravel falling down the uplift tube. Made of special quality plastic which resists splitting and cracking. Includes : Premium Carbon Cartridges Coarse Discard A Stones Telescoping ring for