XINYOU XY-1831 Aquarium Filter Wool (Thickened Filter Cotton) — Overview

The XINYOU XY-1831 is a thickened white aquarium filter wool (过滤棉 / "filter cotton") for mechanical filtration in fish tanks, sumps and filter boxes. The soft, dense polyester floss traps suspended dirt, debris, fish waste and fine particles as water passes through it, polishing the water and keeping your aquarium clear. Each pad measures 100 × 13.5 × 3 cm and can be cut to fit virtually any filter tray, hang-on-back unit, top filter or sump compartment.

Key Features

• Thickened filter floss (加厚装) — extra-dense 3 cm thick wool for more dirt-holding capacity and effective mechanical filtration.
• Long roll, cut-to-size — a single 100 cm length can be trimmed to fit multiple filters and tray sizes.
• Fine water polishing — captures suspended particles and debris for noticeably clearer water.
• Sturdy & durable (结实耐用) — reinforced cotton/fibre construction that holds its shape and resists tearing when rinsed.
• Freshwater aquarium use — suitable for fish tanks, top filters, sumps and DIY filter media stacks.
• Easy to use — simply place in the first (mechanical) filtration stage; rinse or replace when clogged.

Benefits

• Clearer, cleaner aquarium water by removing visible particles and debris.
• Protects downstream biological media and pumps from clogging with coarse waste.
• One length covers several filters — economical and flexible.
• Simple maintenance — rinse to reuse or swap out cheaply.

Why Choose This Product

The thickened (加厚) XY-1831 wool gives more depth and dirt-holding capacity than thin filter pads, so it stays effective longer between cleanings while remaining inexpensive to replace. The generous 100 cm length means one pack serves a range of filter sizes.

Ideal Use Cases

Freshwater aquariums, hang-on-back and top (trickle) filters, canister media trays, sump filtration chambers, and DIY filter stacks where a mechanical / water-polishing layer is needed.

How It Works

Filter wool sits in the mechanical stage of the filter, where incoming water is forced through the dense fibre matrix. Suspended solids, uneaten food and waste are trapped in the floss, while cleaner water passes on to the biological and chemical media. As the wool loads with debris it should be rinsed or replaced to maintain flow.

Technical Specifications

How to Use

Cut the wool to fit your filter tray or compartment and place it in the first (mechanical) stage so water flows through it before reaching biological media. Rinse under tank-temperature water when it clogs, and replace once it no longer cleans up after rinsing.

Maintenance Notes

Rinse the wool in old tank water (not chlorinated tap water) to preserve beneficial bacteria, and replace periodically as the fibres compact. Do not let a heavily clogged pad restrict flow, as this reduces overall filtration.