One 20-count bag should be used for every 100 u. s. gallons.
Grows massive colonies of beneficial bacteria.
Provides more growing area than plastic balls, foam, or undergravel fillers.
Allows best oxygen and water transfer, for best bacterial health.

Technical Details

Product Details

Product Dimensions

Package Dimensions
Width : 6.1 inch
Height : 3.2 inch
Length : 6.1 inch

Item Weight: 0 ounce (View shipping rates and policies)
Shipping Weight: 1.6 ounce (View shipping rates and policies)

ASIN : B005WZV1GA