( 3 ) 16"x 13" Filter Media Bags for Aquarium filter,Pond filter, Bio ball, Bio ring, ¬ for ACTIVE CARBON, BECAUSE NET HOLES ARE SIZE 4MM.
FEATURES:
1,Media bags allow the precise placement of filter media and ensure granular media doesn't travel through pumps and pipes.
2, Great for Bio-balls, bio-rings, phosphate removers, nitrate removers
3, Zipper design for Reusable
4, Size: 16" x 13", Net hole size: 4mm.
5, Made from 100% polyester, Heavy Duty.
INCLUDES:
(3) Black Media bags