The XY-0123 Ammonia Removing Filter Sponge is a high-quality aquarium filtration media made by XINYOU. It is designed to provide multi-stage filtration:

✔ Mechanical filtration (removes dirt & waste)
✔ Biological filtration (supports good bacteria)
✔ Chemical filtration (reduces ammonia)

It is used to keep aquarium water safe, clean, and stable for fish.