Provides biological and chemical filtration and increase the oxygen solubility in aquarium and fish tank. It can be cut as your need, promotes nitrogen cycle, helps reduce the death rate of fish.
Product name: biochemical filter sponge
Material: sponge; color: black
Dimension: 101. 5 x 12 x 2cm/40″ x 4. 7″ x 0. 8″ (L*W*H)
Weight: 61. 9g
Package content: 1 x biochemical filter sponge