---
product_id: 545473426
title: "Bio-cotton Filter High-density Sponge Foam Pool Aquarium Fish Tank Water Filter Cotton (50x4x50-25PPI)"
brand: "shunting"
price: "¥6406"
currency: JPY
in_stock: true
url: https://www.desertcart.jp/products/545473426-bio-cotton-filter-high-density-sponge-foam-pool-aquarium-fish
store_origin: JP
region: Japan
---

# 25 PPI pore density 50x50 cm size Reusable & durable Bio-cotton Filter High-density Sponge Foam Pool Aquarium Fish Tank Water Filter Cotton (50x4x50-25PPI)

**Brand:** shunting
**Price:** ¥6406
**Availability:** ✅ In Stock

## Summary

> 🌊 Dive into Crystal Clear Waters!

## Quick Answers

- **What is this?** Bio-cotton Filter High-density Sponge Foam Pool Aquarium Fish Tank Water Filter Cotton (50x4x50-25PPI) by shunting
- **How much does it cost?** ¥6406 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/545473426-bio-cotton-filter-high-density-sponge-foam-pool-aquarium-fish)

## Best For

- shunting enthusiasts

## Why This Product

- Trusted shunting brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Eco-Friendly & Safe:** Dye-free material ensures safety for your aquatic pets, making it a guilt-free choice.
- • **Space-Saving Design:** Vacuum sealed for compact storage, perfect for any aquarium enthusiast's toolkit.
- • **Long-Lasting Performance:** Regularly clean and reuse for a sustainable filtration solution that stands the test of time.
- • **Efficient Filtration Power:** High-density sponge foam traps waste effectively while promoting biological filtration.
- • **Maximize Your Aquarium's Health:** Large 19.6" x 19.6" filter pads can be cut to fit any filter, ensuring optimal filtration.

## Overview

The SHUNTING Bio-cotton Filter is a high-density sponge foam filter pad designed for aquariums and ponds. Measuring 50x50 cm with a pore density of 25 PPI, it provides exceptional mechanical and biological filtration. The dye-free material is safe for aquatic life, and the vacuum-sealed packaging allows for easy storage. This reusable filter pad is perfect for maintaining a clean and healthy aquatic environment.

## Description

Bio-cotton Filter High-density Sponge Foam Pool Aquarium Fish Tank Water Filter Cotton (50x4x50-25PPI)

## Features

- Large size 19.6"x19.6"x1.57" filter pads are available to be cut to fit your filter for any aquarium or pond filter.Use the volume calculation formula to compare the sizes of other brands Thatis:19.68(L)x19.68(W)*1.57(H)=608 the bigger the parameterthe bigger the sponge. Hope to help you get the best value for money.
- Sponge filters provide mechanical and biological filtration, trap large amounts of waste, and do not clog easily. The size of the pores is measured by the number of pores in the unit area (PPI), the higher the PPI, the more pores in the sponge. It is recommended to use a combination of different size sponges for the best effect.
- Dye-free and safe for aquatic pets. Filter pads are usually used as pre-filters for wet/dry filters, catch basins, and tank filters.
- Regular cleaning. Reusable and durable after cleaning.
- Vacuum sealed and compressed packaging, save space and easy to store, suitable for all types of aquariums. (Unpack first, then restore the size as per the instruction steps, and then it will be ready for use.)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Product Dimensions | 50 x 50 x 4 cm; 190 g |
| Colour | black |
| Size | 50x4x50-25PPI |
| Thickness | 4 Centimetres |
| Number of Items | 1 |
| Quantity | 1 |
| Batteries required | No |
| Batteries Included | No |
| Item Weight | 190 g |

## Images

![Bio-cotton Filter High-density Sponge Foam Pool Aquarium Fish Tank Water Filter Cotton (50x4x50-25PPI) - Image 1](https://m.media-amazon.com/images/I/71BL+LgeCiL.jpg)
![Bio-cotton Filter High-density Sponge Foam Pool Aquarium Fish Tank Water Filter Cotton (50x4x50-25PPI) - Image 2](https://m.media-amazon.com/images/I/71BfT2lxGLS.jpg)
![Bio-cotton Filter High-density Sponge Foam Pool Aquarium Fish Tank Water Filter Cotton (50x4x50-25PPI) - Image 3](https://m.media-amazon.com/images/I/61aZe6M1W0S.jpg)
![Bio-cotton Filter High-density Sponge Foam Pool Aquarium Fish Tank Water Filter Cotton (50x4x50-25PPI) - Image 4](https://m.media-amazon.com/images/I/712zZeh6uuL.jpg)
![Bio-cotton Filter High-density Sponge Foam Pool Aquarium Fish Tank Water Filter Cotton (50x4x50-25PPI) - Image 5](https://m.media-amazon.com/images/I/81MYYNp3rbL.jpg)

## Available Options

This product comes in different **Size Name** options.

## Questions & Answers

**Q: Are they 1.57" thick? Equal to 4cm?**
A: According to the description, they are 4cm thick. Both length and width are 50cm.

**Q: Is this ok for a cats water fountain?**
A: Yes

**Q: Where is the cotton in this?**
A: I don't know where any cotton is as far as I'm aware I think it is synthetic sponge/foam.

**Q: Is this polyurethane foam?**
A: It doesn't feel like polyurethane foam, it didn't come with any material tags. So I'm not 100 percent sure.

## Frequently Bought Together

- SHUNTING Bio-cotton Filter High-density Sponge Foam Pool Aquarium Fish Tank Water Filter Cotton (50x4x50-25PPI)
- BOND IT CLEAR HA6 RTV Silicone Sealant Marine Aquarium Safe Water Fish Tank Adhesive

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**Shop now:** [https://www.desertcart.jp/products/545473426-bio-cotton-filter-high-density-sponge-foam-pool-aquarium-fish](https://www.desertcart.jp/products/545473426-bio-cotton-filter-high-density-sponge-foam-pool-aquarium-fish)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-20*