Package Include: 3 x coarse foam(black), 3 x medium foam(white), 3 x fine foam(blue).
Foam size: 17 inch x 11 inch.
Simply cut holes in the desired position with scissors to fit most filter boxes.
Cleans pond water of suspended debris, keeping efficient water flow with less clogging for long lasting filtration.
Provides a breeding ground for beneficial bacteria, aiding biological filtration.