One note- the link for black mesh in the article points to a calendar on eBay. I think I found a comparable product on Amazon but of course pricier than a craft store.
Thanks again!
I would recommend plastic mesh like this ( https://www.amazon.com/dp/B00KHAYGJO/ref=cm_sw_r_cp_apa_i_fZFGFb4C7SHEH )
I see the filter floss falling apart and not holding up over time.
I used the above plastic mesh for the moss walls in both of my aquariums successfully. Still holding up great!
A N G E R F I S H
Maybe get some of this black plastic grid stuff and make a baffle around the outlet, connect with small zip ties.