Yeah I tried doing that with a yellow potscrubber
I ripped it apart and put 2 layers on. Suffice to say within about 30s little yellow bits were being skimmed out nicely
I was pretty gung ho on this project until I discovered that my ER CS6-2 was sold with a dolphin D-560 pump. It has a needlewheel but its pretty small. I guess ER used to slap any old thing on there
I think I might just move up to a sedra 5000. Maybe get the fanced out one that ER is selling with the modified motor/impeller/whatever else they've modified.
There is a guy in the RC thread that is selling that enkamat stuff. I think his name was mavgdi or something like that.