XINYOU XY-1821 White Super Filter Wool Pad (63×40 cm) — Aquarium & Pond Filter Cotton — Overview

The XINYOU XY-1821 is a white "super filter cotton" (超级过滤棉) — a soft polyester filter-wool pad for fine mechanical filtration in aquariums and fish ponds. The dense white floss traps suspended dirt, debris and fine particles as water flows through, polishing the water for a clear, healthy tank. Supplied as a flat sheet that is easily cut to fit any filter tray, sump, top filter, hang-on-back unit or pond filter pool.

Key Features

• Fine water polishing — soft dense floss captures suspended particles and debris for noticeably clearer water.
• "Super" filter cotton (超级过滤棉) — high-loft white polyester wool for effective mechanical filtration.
• Sheet form, cut-to-size — trims to fit aquarium filters, sumps and pond pools.
• Suitable for aquariums & fishponds — works in tanks and large filter pools.
• White colour — shows trapped dirt clearly so you know when to clean or replace.
• Easy to use — place in the first (mechanical) filtration stage; rinse or replace when clogged.

Benefits

• Clearer, polished water by removing fine suspended particles.
• Protects downstream biological media and pumps from clogging with coarse waste.
• Flexible and economical — one sheet serves several filters.

Why Choose This Product

As a fine "super" filter wool, the XY-1821 polishes water more thoroughly than coarse pads, and the white colour makes it easy to see when it is loaded with dirt. The flat sheet cuts to any size, so a single pack covers a range of aquarium and pond filters.

Ideal Use Cases

Aquarium sumps, top/trickle filters, hang-on-back units, canister media trays, fish-pond filter pools, and DIY filter stacks where a fine mechanical / water-polishing layer is needed.

How It Works

Filter wool sits in the mechanical stage, where water is forced through the dense fibre. Suspended solids and waste are trapped in the floss while cleaner, polished water passes through to biological and chemical media. Rinse or replace as it loads with debris 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 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 in old tank water (not chlorinated tap water) to preserve beneficial bacteria, and replace periodically as the fibres compact. Avoid letting a clogged pad restrict flow.