Premium AOF28170 Felt Filter Media Bag for Aquarium – 4" x 6.5" – High-Quality Mechanical & Biological Filtration – Perfect for Fish Tanks, Turtle Habitats & Aquatic Ecosystems

South Ocean Five felt filter media bag is combination of felt material and polyester mesh material sewn together. Media bag is made from 100-percent polyester with a polyester tie cord, sewn with a five-string merrow machine with a full safety stitch inside. This gives the bags added strength for holding carbon or other substrates without stretching as well as filtering the water. Using this bag in the outflow of most protein skimmers, will avoid bubbles in the sump. Measures 4-inch width by 6-1/2-inch height.

Felt filter media bag is combination of felt material and polyester mesh material sewn together

Made from 100-percent polyester with a polyester tie cord, sewn with a five-string merrow machine with a full safety stitch inside

This gives the bags added strength for holding carbon or other substrates without stretching as well as filtering the water

Using this bag in the outflow of most protein skimmers, will avoid bubbles in the sump

Measures 4-inch width by 6-1/2-inch height