Bio-Blox Filter Media is a great low-cost choice for large volume applications. 

BBM1 EasyPro Bio-Blox Filter Media; 1 cu.ft. box

BBM2B Mesh bag (MB21) with 2 cubic feet of Bio-Blox

Great low-cost choice for large volume applications. EasyPro grinds this media in-house, allowing us to offer very competitive pricing.

• Approximately 500 square feet of surface area in every cubic foot of material, this allows for maximum filtration in a given area
• Polyester material will last for years
• Available in a 1/3, one, ten or twenty five cubic foot box
• Also available in 2 cu. ft. pre-filled mesh bags