I put it in the bottom of my filter as instructed. But it's a bit thick, the sponge that goes in the filter was poking out the top so I had to squash it down a bit to get the lid on. Does this matter?
If you look on ebay under filter media you can buy filter matting in bulk in thicknesses from 5mm to about 30mm very cheaply.Just changed it to a thin layer.
not sure why need need filter floss but dont leave it in there for too long as it will capture lots of small bits and eventually block the filter, take it out after a week and rinse it out in tank water and you can reuse it.