Is the default eheim ecco pro filter media sufficient ?

[bernie]

Is it advisable to stuff in some filter wool into the canister for better filtration ? Clearer water and such.

[aquarius]

If you're refering to the white filter wool, than is Yes. We place it on the top most layer of the eheim. It's the last layer before the water goes out of the filter.

[fish11]

Yes, actually it is sufficient for a good filtration. Just remember to change the white wool pad every two 2 weeks.