Can You Use Polyfill As Fish Tank Filter Floss?

Can You Use Polyfill As Fish Tank Filter Floss? One of the best cheap substitutes for filter floss is untreated polyester quilting material. Mainly, it’s sold under a trademark called Poly-Fil. You can also use pillow stuffing but make sure to avoid non-allergenic and fire retardant pillows. Is polyester safe for fish? Just make sure