Promotes growth of beneficial bacteria
Fits the Fluval U2, U3 and U4 Filters
Replenish only half at one time
Works in freshwater or marine environments

Technical Details

Product Details

Product Dimensions

Package Dimensions
Width : 2.7 inch
Height : 1.8 inch
Length : 5.3 inch

Item Weight: 5.92 ounce (View shipping rates and policies)
Shipping Weight: 3.36 ounce (View shipping rates and policies)

ASIN : B001XRR2IM