The water flows from the bottom up through your filtration system. To optimize efficiency:
Place the soft, more open side of the FilterFirst pad down against the sponge.
Follow with the polishing pads, ensuring their soft side is also facing down.
This layering method is designed to improve both water clarity and quality.
Pro Tip for Goldfish Owners: Since goldfish tend to produce more waste than tropical fish, you may need to rinse or replace the pads more frequently to maintain optimal performance.