NU-Foam densified batting- used as filter material?
I just came across some stuff in the quilting department of a local craft shop called "Nu-foam" that appears to be a possible filter material. It is labeled as "densified batting" and made of polyester. I have been researching it online, and the general opinion is that it is mildew resistant because it does not retain water (in other words it is not treated with anything for that purpose). Some people are using it as mechanical filter material, but not as biological material.
Anyone here using it? Based on it's appearance, I would think it would be a great biological filter so I do not understand the thinking there. I went to the manufacturer's website and found this comment...
Question : Can I use NU-Foam® for an aquarium filter?
[COLOR=#1b6c9e !important]Answer : [/COLOR]We do not recommend using NU-Foam® in an aquarium filter because it is made from 100% polyester. Aquarium filters should be made from 100% polypropylene.
Polypropylene? What? I thought polyester was used all the time? Or am I confused?