Pond Force™ Bio-Blocks Biological Sponge Media Size:8 Cubic Feet Bulk for a shelf life of

for a shelf life of up to two years

Sludge digesting bacteria that consume waste

For best results use when algae is actively growing

Stops algae growth and works on string algae

The Pellet Size is small

Pond Force™ Bio-Blocks Biological Sponge Media Size:8 Cubic Feet Bulk for a shelf life ofPond Force Bio Blocks polyester sponge blocks provide an ideal environment for the cultivation of beneficial bacteria. With over 500 square feet of surface area per cubic foot of Bio Blocks, bacteria will have plenty of room to grow and thrive. "1 Cubic Foot" quantity comes in 20" x 30" mesh bag "8 Cubic Feet" bulk quantity comes loose in box