XINYOU Zeolite (沸石), 500 g box — natural mineral filter media that removes toxic ammonia by ion exchange. Large surface area, strong adsorption, chemically stable. Ideal for new/cycling and quarantine freshwater tanks. Use loose or in a media bag.

XINYOU Ceramic Rings (陶瓷滤环), 300 g box — porous sintered-ceramic biological filter media. A huge micro-pore surface hosts nitrifying bacteria to break down ammonia and nitrite for clean, stable water. For canisters, sumps, top filters and ponds. Freshwater & marine.

XINYOU XY-1819 green biochemical filter pad, bonded-fibre, 90 × 30 × 2 cm. Mechanical + biological filtration for aquariums and ponds. Reusable, cut-to-size for sumps, top filters and filter pools. Freshwater. Part of the colour-coded series (white 1818 / green 1819 / blue 1820).

XINYOU XY-1820 blue biochemical filter pad, bonded-fibre, 90 × 30 × 2 cm. Mechanical + biological filtration for aquariums and ponds. Reusable, cut-to-size for sumps, top filters and filter pools. Freshwater. Part of the colour-coded series (white 1818 / green 1819 / blue 1820).

XINYOU XY-1861 white super filter wool / filter cotton (过滤棉), thickened, 100 × 13 × 1 cm strip (1-piece pack). Fine mechanical filtration and water polishing for aquariums. Cut-to-size for top filters, sumps and trays. Freshwater.

XINYOU XY-360 Bio-Balls (生物球) — hollow lattice plastic spheres with a sponge insert for strong biological filtration. Huge surface area for nitrifying bacteria, free-flowing and low-clogging. Sizes 26/36/46 mm. For canisters, sumps, trickle filters and ponds. Freshwater & marine.