I think we are talking about different things. When I think of filter floss I’m talking about something like this which I literally just tear off a handful and stick it in a floss holder above a bag of chemipure elite. It’s the same stuff you can get at the craft store for dirt cheap to stuff pillows.
If I’m not using that then I’m using this stuff cut into rectangles to fit in the floss holder. Blue side up. Just ordered this big roll a couple of days ago, I’ve been using the smaller ones that cost way too much compared to this one.
I’ve even used pieces cut off of a roll of refills for Klir filter rollers and put them on top of whatever I have in the floss holders. I like that stuff because it’s so thin so it works well on top of other media.