Other weird uses of common items:
1. a mini colander instead of a net: this spares fish gill covers getting snagged.
2. plastic needlepoint embroidery canvas (cuts with scissors, stitches with fishing line, makes boxes, covers, barriers through which water can flow. [Hobby store: ask the clerk]
3. pillow stuffing: subs for floss, costs far less: [hobby or sewing store] use and toss.
regarding the post above, a netting bag (you can get net where diy wedding supplies are sold in hobby or fabric store) full of coral rubble is a good copepod nursery in your sump. Just shake it out now and again to clean it (using a filter sock on the system when donig so.)
Strawberry cartons (those plastic ones) turned upside down and filled with coral rubble also make good copepod nurseries.