---
product_id: 12805154
title: "Small World Replacement Aquarium Filter Media (2 Pack) – Safe for Freshwater and Saltwater Setups, SWF1C"
brand: "penn-plax"
price: "AR$36838"
currency: ARS
in_stock: true
reviews_count: 12
category: "Penn Plax"
url: https://www.desertcart.com.ar/products/12805154-small-world-replacement-aquarium-filter-media-2-pack-safe-freshwater
store_origin: AR
region: Argentina
---

# Optimized for freshwater & saltwater Dual-stage chemical & bio filtration Eco-friendly reusable cartridge design Small World Replacement Aquarium Filter Media (2 Pack) – Safe for Freshwater and Saltwater Setups, SWF1C

**Brand:** penn-plax
**Price:** AR$36838
**Availability:** ✅ In Stock

## Summary

> ♻️ Keep your aquatic world fresh, flawless, and fuss-free!

## Quick Answers

- **What is this?** Small World Replacement Aquarium Filter Media (2 Pack) – Safe for Freshwater and Saltwater Setups, SWF1C by penn-plax
- **How much does it cost?** AR$36838 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/products/12805154-small-world-replacement-aquarium-filter-media-2-pack-safe-freshwater)

## 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

- • **Compact & Visible Design:** Slim 1.3” x 1.1” x 4.1” cartridges let you monitor filter status at a glance—never get caught off guard.
- • **Effortless Cartridge Swap:** Quick, no-fuss installation ensures you never miss a beat in maintaining your aquatic ecosystem.
- • **Odor & Contaminant Eradicator:** Effectively removes harmful toxins, discoloration, and odors to keep your tank pristine and inviting.
- • **Precision Dual-Action Filtration:** Combines carbon/zeolite chemical filtration with bio sponge mechanical & biological cleaning for crystal-clear water.
- • **Universal Fresh & Saltwater Compatibility:** Engineered to perform flawlessly in both freshwater and saltwater tanks up to 5 gallons.

## Overview

Penn-Plax Small World Replacement Aquarium Filter Media (2 Pack) offers a scientifically formulated dual filtration system combining carbon/zeolite chemical media with a bio sponge for mechanical and biological filtration. Designed for Small World filters (SWF1), these cartridges fit tanks up to 5 gallons and are safe for both freshwater and saltwater setups. They efficiently remove contaminants, odors, and discoloration, ensuring a healthy environment for aquatic life with easy installation and visible cartridge status.

## 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: Great Little Filter/Bubbler For The Price - I wanted a small filter/bubbler for a 2 gallon fish bowl and decided to give this one a try because of the price and because it came with a pump. It was easy to set up and install. It stayed suctioned to the side of the glass with no problem. I like that it comes with a release valve so that you can control the amount of air flow. I read a lot of the other reviews where they mentioned too many bubbles - that's probably from not using the enclosed valve. I highly suggest using it if your tank is under 2 gallons. My set up is a 2 gallon fish bowl that's mostly an aqua scape of live plants, driftwood, and gravel. It has an outer heat lamp for the live plants. I'm going to leave about 2 to 3 inches at the top to allow for slight spatter from the bubbles. I do intend to add fish - probably two female bettas, or a few white cloud minnows. Being an aqua scape, I won't add more fish than that. Otherwise, it looks like the filter is going to work great for this set up. So far, so good.
Review: Penn Plax Small World Aquarium Filter Review - After having numerous problems with waterfall filters that suck up small fish and tadpoles, I found this product and would not have any other filter. I use it for my 10 gallon tank and it works very well. All you do is connect it to your aerator. There is no suction at all and no waterfall to toss my small fish around. It cleans the water and provides oxygen for your aquatic buddies. The filter cartridge is visible, so you know exactly when to change it. Not all pet stores carry this product, but it is well worth it to order the extra cartridges online (as you can find it for the same price you would in stores even with shipping). When I accidently threw away the cartridge holder, I went out of my way to find it again for the safety of my fish. However, if you have live tubifex worms, they will make a home out of the filter if it is too close to the ground so I recommend placing it high in your tank. But if it does happen and you don't want to kill them, slowly move the filter out of the water over the course of a day or two and they will wiggle their way out and back to the gravel. But anyways, I would definitely recommend this product for anyone.

## 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 |
| ASIN  | B00025655C |
| Age Range Description | All Life Stages |
| Best Sellers Rank | #24,206 in Pet Supplies ( See Top 100 in Pet Supplies ) #345 in Aquarium Filter Accessories |
| Brand | Penn-Plax |
| Brand Name | Penn-Plax |
| Care Instructions | Hand Wash |
| Color | Black |
| Country of Origin | China |
| Customer Reviews | 4.3 4.3 out of 5 stars (2,754) |
| Date First Available | October 2, 2001 |
| Date First Available  | October 2, 2001 |
| Department | Unisex-Adult |
| Department  | Unisex-Adult |
| Directions | 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. |
| External Testing Certification | WQA |
| Global Trade Identification Number | 00030172390050 |
| Included Components | Penn-Plax Small World Replacement Aquarium Filter Media Cartridges (2 Pack) – Safe for Freshwater and Saltwater Setups, SWF1C |
| Is Discontinued By Manufacturer  | No |
| Item Dimensions LxWxH | 6 x 2 x 6 inches |
| Item Package Dimensions L x W x H | 7.25 x 5.5 x 1.25 inches |
| Item Weight | 0.16 ounces |
| Item model number | SWF1C |
| Item model number  | SWF1C |
| Manufacturer | Penn Plax |
| Manufacturer  | Penn Plax |
| Material | Plastic |
| Model Name | Penn-Plax Small World Replacement Aquarium Filter Media Cartridges (2 Pack) – Safe for Freshwater and Saltwater Setups, SWF1C |
| Number of Items | 1 |
| Product Benefits | Removes contaminants, clears discoloration, and reduces odors in aquariums |
| Product Dimensions | 1.1"D x 1.1"W x 4.1"H |
| Product Dimensions  | 6 x 2 x 6 inches; 0.16 ounces |
| Set Name | 2 Pack |
| Size | 2pk |
| Specific Uses for Product | Indoor |
| Style | Replacement Filter Media Cartridges |
| Target Audience Keyword | fish |
| UPC | 742117635224 030172390050 |
| Unit Count | 1.0 Count |
| Warranty Description | Full Amazon Policy |

## Product Details

- **External Testing Certification:** WQA
- **Item Weight:** 0.01 Pounds
- **Material:** Plastic
- **Product Benefits:** Removes contaminants, clears discoloration, and reduces odors in aquariums
- **Product Dimensions:** 1.1"D x 1.1"W x 4.1"H

## Images

![Small World Replacement Aquarium Filter Media (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

### ⭐⭐⭐⭐⭐ Great Little Filter/Bubbler For The Price
*by S***H on November 1, 2019*

I wanted a small filter/bubbler for a 2 gallon fish bowl and decided to give this one a try because of the price and because it came with a pump. It was easy to set up and install. It stayed suctioned to the side of the glass with no problem. I like that it comes with a release valve so that you can control the amount of air flow. I read a lot of the other reviews where they mentioned too many bubbles - that's probably from not using the enclosed valve. I highly suggest using it if your tank is under 2 gallons. My set up is a 2 gallon fish bowl that's mostly an aqua scape of live plants, driftwood, and gravel. It has an outer heat lamp for the live plants. I'm going to leave about 2 to 3 inches at the top to allow for slight spatter from the bubbles. I do intend to add fish - probably two female bettas, or a few white cloud minnows. Being an aqua scape, I won't add more fish than that. Otherwise, it looks like the filter is going to work great for this set up. So far, so good.

### ⭐⭐⭐⭐⭐ Penn Plax Small World Aquarium Filter Review
*by M***A on July 17, 2013*

After having numerous problems with waterfall filters that suck up small fish and tadpoles, I found this product and would not have any other filter. I use it for my 10 gallon tank and it works very well. All you do is connect it to your aerator. There is no suction at all and no waterfall to toss my small fish around. It cleans the water and provides oxygen for your aquatic buddies. The filter cartridge is visible, so you know exactly when to change it. Not all pet stores carry this product, but it is well worth it to order the extra cartridges online (as you can find it for the same price you would in stores even with shipping). When I accidently threw away the cartridge holder, I went out of my way to find it again for the safety of my fish. However, if you have live tubifex worms, they will make a home out of the filter if it is too close to the ground so I recommend placing it high in your tank. But if it does happen and you don't want to kill them, slowly move the filter out of the water over the course of a day or two and they will wiggle their way out and back to the gravel. But anyways, I would definitely recommend this product for anyone.

### ⭐⭐⭐⭐⭐ I regretted it, then I loved it!!
*by T***G on January 24, 2024*

I did alot of research for slow flow betta filters and seen this one highly recommended and for the cost I ordered two sets for both my bettas. When I first hooked it up, the flow was crazy fast and I was so sad.. didn't even set up the second one because I was ready to return. I didn't see the part that you can add to the tubing to adjust the flow. Once I found that part when I set up the second one, I was AMAZED. Bettas don't like fast flows, almost no movement is their preference because more can stress and tear them up. This filter works amazing. I can slow it down to barely a bubble just enough and my bettas are so happy! I would definitely recommend these over any expensive pet store filter!!

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*Product available on Desertcart Argentina*
*Store origin: AR*
*Last updated: 2026-01-25*