---
product_id: 294067216
title: "Penn-Plax Small World Replacement Aquarium Filter Media Cartridges (2 Pack) – Safe for Freshwater and Saltwater Setups, SWF1C"
brand: "penn-plax"
price: "A$54"
currency: AUD
in_stock: true
reviews_count: 5
category: "Penn Plax"
url: https://www.desertcart.com.au/products/294067216-penn-plax-small-world-replacement-aquarium-filter-media-cartridges-2
store_origin: AU
region: Australia
---

# Safe for fresh & saltwater tanks Dual-stage chemical & bio filtration 2-pack for seamless filter swaps Penn-Plax Small World Replacement Aquarium Filter Media Cartridges (2 Pack) – Safe for Freshwater and Saltwater Setups, SWF1C

**Brand:** penn-plax
**Price:** A$54
**Availability:** ✅ In Stock

## Summary

> 🌟 Keep your aquatic world crystal clear — because your fish deserve the best!

## Quick Answers

- **What is this?** Penn-Plax Small World Replacement Aquarium Filter Media Cartridges (2 Pack) – Safe for Freshwater and Saltwater Setups, SWF1C by penn-plax
- **How much does it cost?** A$54 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/294067216-penn-plax-small-world-replacement-aquarium-filter-media-cartridges-2)

## Best For

- penn-plax enthusiasts

## Why This Product

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

## Key Features

- • **Ready When You Are:** Includes two cartridges so you never run out of essential filter media.
- • **Compact & Compatible:** Precisely engineered for Small World SWF1 filters, perfect for tanks up to 5 gallons.
- • **Effortless Aquarium Clarity:** Quickly removes discoloration, odors, and harmful toxins for pristine water.
- • **Dual-Action Filtration Power:** Combines carbon/zeolite chemical filtration with bio sponge mechanical and biological cleaning.
- • **Universal Fresh & Saltwater Use:** Versatile design supports both freshwater and saltwater aquarium ecosystems.

## Overview

Penn-Plax Small World Replacement Aquarium Filter Media Cartridges (2-pack) deliver advanced chemical, mechanical, and biological filtration tailored for Small World SWF1 filters. Designed for tanks up to 5 gallons, these cartridges combine carbon and zeolite to eliminate toxins, discoloration, and odors, while the bio sponge supports beneficial bacteria growth. Safe for both freshwater and saltwater setups, this easy-to-install 2-pack ensures your aquarium stays vibrant and healthy with hassle-free media replacement.

## Description

PENN-PLAX presents the Small World Replacement Aquarium Filter Media Cartridges. These Media Cartridges are specifically designed for Small Word Filters (Model SWF1), allowing for simple and easy media replenishment, and are for aquariums, tanks, and habitats up to 5 gallons. Cartridges come in a 2 pack. Furthermore, they’re safe for both Freshwater and Saltwater setups. Carbon & Zeolite Mixture: Supercharged with scientifically formulated Carbon and Zeolite Crystals, these replacement cartridges absorb ammonia, nitrites, nitrates, and phosphates in a fast and timely manner, along with removing harmful chemicals and toxins, clearing up discolorations, and reducing foul odors from your aquarium, tank, or habitat. Bio Sponge: In addition to the Carbon and Zeolite Crystals, these replacement media cartridges also contain a Bio Sponge for physical filtration of larger particulate matter, and biological filtration that optimizes the colonization of anaerobic bacteria. Cleaning & Maintenance: Before placing into your aquarium, tank, or habitat, please briefly rinse the media cartridge with warm water in order to remove Carbon or Zeolite dust. If not done before installation, the water could initially become dark or cloudy. Please Note: The Small World Replacement Media Cartridges (SWF1C) do not come with a Filter, Air Tubing, or an Air Pump – All Sold Separately. Measurements: Each Filter Media Cartridge measures 1.3” x 1.1” x 4.1”

Review: Perfect replacement cartridges for my little Small World filter which I'm using in a 12ltr tank reserved for baby Platies! 🐟 Unfortunately these cartridges don't come apart, so you can't prolong the life of them by rinsing the interior sponges out in tank water, making them pretty expensive seeing as they need changing every 2/3 weeks, but at least they come in a two-pack so there's a spare for the next change-over. Easy to click in and genuine Small World filter media 🙂
Review: Gr8 4 small tanks

## Features

- Easy to install replacement cartidges for your Small World filters.
- High quality carbon/zeolite cartridge for chemical filtration and a foam block filter for mechanical & biological filtration
- Clears discoloration and removes harmful contaminants & odors.
- Insures you have replacement cartridges when you need them.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00025655C |
| Brand | Penn-Plax |
| Country of Origin | USA |
| External Testing Certification | WQA |
| Generic Name | Replacement Aquarium Filter Media |
| Global Trade Identification Number | 00030172390050 |
| Included Components | 2 Replacement Aquarium Filter Media Cartridges |
| Item Weight | 4.54 g |
| Item model number | SWF1C |
| Manufacturer | Monster Pets |
| Material | Other |
| Net Quantity | 2.0 Count |
| Number of Items | 1 |
| Product Benefits | Removes contaminants, clears discoloration, and reduces odors in aquariums |
| Product Dimensions | 28D x 28W x 104H Millimeters |
| Set Name | 2-pack |
| UPC | 742117635224 030172390050 |

## Product Details

- **External Testing Certification:** WQA
- **Item Weight:** 5 g
- **Material:** Other
- **Product Benefits:** Removes contaminants, clears discoloration, and reduces odors in aquariums
- **Product Dimensions:** 28D x 28W x 104H Millimeters

## Images

![Penn-Plax Small World Replacement Aquarium Filter Media Cartridges (2 Pack) – Safe for Freshwater and Saltwater Setups, SWF1C - Image 1](https://m.media-amazon.com/images/I/81FK-eXpEJL.jpg)

## Questions & Answers

**Q: does it work on 0.5 gallon tank with a betta**
A: I use my PennPlax in a 5 gallon tank with a betta and it works great. I do partial water changes every 2 weeks. Are you asking if it works with a tank that hold 1/2 gallon? (0.5) If so, I would say NO. It is too strong for such a small space. Also, betta's should be kept in a MINIMUM 2.5; but 5 gal. or more is optimal, with heater and filter.

**Q: I forgot to rinse it before installing it and all this white stuff came out-- is that okay? I'm only running it right now to cycle the tank (no fish.)**
A: Hey Kristy, 

Thanks for your question. The white stuff you're seeing is just dust particles from the filter media. It won't have any negative effect on your tank. Just let it continue to cycle and all of the particles will be picked back up by the filter.

**Q: How long is this filter and does it provide mechanical filtration?**
A: It is about 4" long and works very well by pushing air/water through the filter material and charcoal. A good investment for small tank. (1-2) Gallon) Have been using one for about 15 years. Good product!!

**Q: Will this work for a round bowl? No flat sides on mine**
A: It can just lay on the bottom out of the way if your bowl is big enough. I have a little tank and just leave it without the suction cups and it works fine. You could also get a small sponge filter for your bowl. They both need an air pump to work and are about the same cost. Hope this helps.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by S***E on 28 August 2020*

Perfect replacement cartridges for my little Small World filter which I'm using in a 12ltr tank reserved for baby Platies! 🐟 Unfortunately these cartridges don't come apart, so you can't prolong the life of them by rinsing the interior sponges out in tank water, making them pretty expensive seeing as they need changing every 2/3 weeks, but at least they come in a two-pack so there's a spare for the next change-over. Easy to click in and genuine Small World filter media 🙂

### ⭐⭐⭐⭐⭐ Review
*by G***L on 22 February 2023*

Gr8 4 small tanks

### ⭐⭐⭐⭐⭐ Review
*by M***E on 12 April 2019*

If you do not have a adjustable check valve the pressure from these filters will be very strong but the filter does it’s job well with regular siphoning, without siphoning filter gets dirty very quick and will have to change the cartridge before 4-6 weeks as it specifies.

## Frequently Bought Together

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*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-03-12*