Poly Bio Filter?

[tmccaff]

Who uses them? I use them and noticed they dont last that long in my tank. They turn brown rather quickly. I supposed to replace it when it turns dark brown correct? This is the product I am using:

POLY-BIO-MARINE, Inc.

POLY-BIO-MARINE - Specialized Water Filtration Systems

www.poly-bio-marine.com

 

[blaxsun]

Used to use them, then I switched to filter socks and then a fleece roller.