Foam Sponge Block Filter 2" X 4" X 18" Aquarium Sump Refugium Wet-dry Filtration

This listing is for one aquarium filter sponge.

This foam block sponge works great for wet/dry, refugium, and basic sumps.
Measures 2" x 4" x 18"

This sponge works with our 40 gal kits.