I use the nylon screen type. That plug up quicker than the felt type.
I have one covering a 4" 200 micron sock. The diy poly floss sock will plug up first, most of the time.
My first 200 micron 6" x 12 sock lasted 16 hours at 400 gph. It filters 20 cichlids, 1 pleco and an algae scrubber.
With two 3/4" thick poly floss diy, sock liners it will last about 5 days.
Hot gluing the socks is very easy, and materials for 50 socks is less than $10.
They can be rinsed out once, before they are destroyed.
The heavy felt, I got some marketed for air vents, can be reused numerous times, makes a good 1st layer.