Has anyone used bio-balls in canister filter? I have a box of these http://www.amazon.com/Marineland-PA1.../dp/B000NRXB5G
that I was thinking about using in a canister filter. I've read some opinions that say bio-balls are really only good in a wet-dry. Marineland sells this product for use in its canister filters, so I question why some would say bio-balls are no good for canisters. Should I stick to the ceramic rings type media? I am looking for feedback from people who have actually used this product or similar product
in a canister filter.