---
product_id: 2333777
title: "Cascade 300"
brand: "penn-plax"
price: "A$173"
currency: AUD
in_stock: null
reviews_count: 11
category: "Penn Plax"
url: https://www.desertcart.com.au/products/2333777-cascade-300
store_origin: AU
region: Australia
---

# 300 GPH powerful flow Quad-stage filtration system Adjustable flow knob Cascade 300

**Brand:** penn-plax
**Price:** A$173
**Availability:** ❌ Out of Stock

## Summary

> 💧 Elevate your aquarium game with whisper-quiet, powerhouse filtration!

## Quick Answers

- **What is this?** Cascade 300 by penn-plax
- **How much does it cost?** A$173 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/2333777-cascade-300)

## 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

- • **Oxygenate & Detoxify:** Bio-Falls system enhances oxygen levels while naturally reducing harmful ammonia and nitrate buildup.
- • **Sleek Hang-On Design:** Space-saving, secure mounting with an extendable lift tube (8.25”–12.25”) for versatile aquarium setups.
- • **Tailored Flow Control:** Adjust water flow effortlessly with the intuitive knob—perfect for feeding or delicate aquatic life.
- • **Quad-Stage Filtration Power:** Activated Carbon, Poly Fiber Floss, Bio-Sponge & Bio-Falls system combine to eliminate toxins, odors, and nitrates.
- • **Crystal Clear Aquarium, Always:** Delivers 300 gallons per hour for pristine water clarity in tanks up to 100 gallons.

## Overview

The Cascade 300 Power Hang-On Filter by Penn-Plax is a compact yet robust filtration system designed for freshwater and saltwater aquariums up to 100 gallons. Featuring a powerful 300 GPH flow rate, adjustable water flow control, and a quad-stage filtration process—including activated carbon, poly fiber floss, and a bio-sponge cartridge—this filter ensures crystal clear, toxin-free water. Its innovative Bio-Falls system boosts oxygenation and reduces harmful ammonia and nitrates, all housed in a sleek, easy-to-mount design with an extendable lift tube for versatile installation.

## Description

Penn-Plax presents the The Cascade 300 Power Hang-On Filter quietly delivers crystal clear water throughout the aquarium. This filter pushes water at 300 Gallons per Hour (GPH) for tanks up to 100 Gallons in size. It’s great for Freshwater and Saltwater aquariums.ACCOMMODATING: The adjustable flow knob allows for increased or decreased water flow at will, which is extremely helpful during feeding times, or use it as needed. The hang-on design is constructed for safe mounting. The lift tube extends between 8. 25” (min) and 12. 25” (max). Please be aware that the filter indeed does make some noise. EXTREMELY BENEFICIAL: This Cascade filter utilizes disposable, double-sided media cartridges that contain Activated Carbon and Poly Fiber Floss. The included cartridge traps floating particulate matter, removes harmful chemicals and toxins, clears up discolorations, and reduces foul odors from your aquarium’s water. Media cartridges are recommended to be replaced once a month. REVOLUTIONARY: The Cascade 300 Power Hang-On Filter features a Bio-Sponge cartridge that optimizes colonization of anaerobic bacteria, and is independent from the first stage filter media. In addition, our Bio-Falls system enhances water oxygenation, and aids with removing ammonia and nitrate.OVERALL MEASUREMENTS: 8. 25” (H) x 11. 25” (W) x 6. 25” (D).

Review: Cute, little, and useful filter. - Such a tiny power filter!!! Who knew of such a thing existing??? Works great, easy to clean, keeps my 3 gallon long tank sparkling, and makes the water move alittle, too, which the fish seem to appreciate.
Review: Adorable & Functional! - Ok. First, this is so little it's adorable! Would I use it on a 10g? Absolutely not. I have this on a 3g tank that has a betta and a couple shrimp in it. The flow rate is adjustable. It's quite. It fits a 3g rimless tank! I put a sponge on the intake....cuz shrimpies. I also cut my own sponges I have for other tanks instead of the premade ones. Worked just fine! It's only been up a day. So not sure the longevity of product. Will update if it crashes to quickly.

## Features

- QUIET & EFFICIENT: The Cascade 300 Power Hang-On Filter quietly delivers crystal clear water throughout the aquarium. This filter pushes water at 300 Gallons per Hour (GPH) for tanks up to 100 Gallons in size. It’s great for Freshwater and Saltwater aquariums.
- ACCOMMODATING: The adjustable flow knob allows for increased or decreased water flow at will, which is extremely helpful during feeding times, or use it as needed. The hang-on design is constructed for safe mounting. The lift tube extends between 8. 25” (min) and 12. 25” (max). Please be aware that the filter indeed does make some noise.
- EXTREMELY BENEFICIAL: This Cascade filter utilizes disposable, double-sided media cartridges that contain Activated Carbon and Poly Fiber Floss. The included cartridge traps floating particulate matter, removes harmful chemicals and toxins, clears up discolorations, and reduces foul odors from your aquarium’s water. Media cartridges are recommended to be replaced once a month.
- REVOLUTIONARY: The Cascade 300 Power Hang-On Filter features a Bio-Sponge cartridge that optimizes colonization of anaerobic bacteria, and is independent from the first stage filter media. In addition, our Bio-Falls system enhances water oxygenation, and aids with removing ammonia and nitrate.
- OVERALL MEASUREMENTS: 8. 25” (H) x 11. 25” (W) x 6. 25” (D)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0002DJ82G |
| ASIN  | B0002DJ82G |
| Age Range Description | All Life Stages |
| Best Sellers Rank | #21,440 in Pet Supplies ( See Top 100 in Pet Supplies ) #88 in Aquarium Filters |
| Brand Name | Penn-Plax |
| Color | Clear blue |
| Customer Reviews | 4.1 4.1 out of 5 stars (6,481) |
| Date First Available | August 3, 2004 |
| Date First Available  | August 3, 2004 |
| Department | Unisex-Adult |
| Department  | Unisex-Adult |
| Directions | Follow included paper instructions. |
| Included Components | Penn-Plax Cascade 300 Power Filter – Hang-On Filter with Quad Filtration – Great for Freshwater and Saltwater Setups |
| Is Discontinued By Manufacturer  | No |
| Item Dimensions LxWxH | 6.25 x 11.25 x 8.25 inches |
| Item Package Dimensions L x W x H | 11.42 x 8.62 x 6.54 inches |
| Item Weight | 0.01 Ounces |
| Item model number | CPF5 |
| Item model number  | CPF5 |
| Manufacturer | Penn Plax |
| Manufacturer  | Penn Plax |
| Material | Plastic |
| Model Name | Penn-Plax Cascade 300 Power Filter – Hang-On Filter with Quad Filtration – Great for Freshwater and Saltwater Setups |
| Number of Items | 1 |
| Product Dimensions  | 6.25 x 11.25 x 8.25 inches; 0.01 ounces |
| Size | Cascade 300 |
| Specific Uses for Product | Indoor |
| Target Audience Keyword | fish |
| Warranty Description | Warranty |

## Images

![Cascade 300 - Image 1](https://m.media-amazon.com/images/I/61AIuLtYjzL.jpg)
![Cascade 300 - Image 2](https://m.media-amazon.com/images/I/61xlKGB7xbL.jpg)
![Cascade 300 - Image 3](https://m.media-amazon.com/images/I/61zhiGsovWS.jpg)
![Cascade 300 - Image 4](https://m.media-amazon.com/images/I/71HCWp6gcAL.jpg)
![Cascade 300 - Image 5](https://m.media-amazon.com/images/I/71q6c7ZH7dL.jpg)

## Available Options

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

## Questions & Answers

**Q: Hey guys, what is the voltage? does it go from 110 v to 240v? i don't see it on amazon uk. if it doesn't work with 240v, what can i do? thanks.**
A: Thanks for your question. This filter is 110V and there's no way to adjust it to 240V for England. We wouldn't recommend running this filter with a power converter, so your best bet may be to stop by your favorite local aquarium store to purchase your filter.

**Q: I always buy the replacement carbon filters but where are the 2 black replacement foam sponge filters?**
A: When I buy these filters I throw away the black foam.I used the white filter fiber works so much better..and gets your water clean and clear faster..

**Q: I have a 56 gallon tall tank and need a filter that works well in this type. Will this model work well in the tall tank type?**
A: I think you will be happy with this filter. I am using one in my 200 gal fish tank I like it because 1. it is a good filter 2. It keeps the water oxygenated. ( lot's of bubbles )  :-) when I get my 75 gal tank ready I all ready have one for it.

**Q: What is the KWH for the 300 per day?**
A: idk but its probably not anything your going to notice

## Customer Reviews

### ⭐⭐⭐⭐⭐ Cute, little, and useful filter.
*by S***4 on December 19, 2025*

Such a tiny power filter!!! Who knew of such a thing existing??? Works great, easy to clean, keeps my 3 gallon long tank sparkling, and makes the water move alittle, too, which the fish seem to appreciate.

### ⭐⭐⭐⭐⭐ Adorable & Functional!
*by D***D on November 12, 2025*

Ok. First, this is so little it's adorable! Would I use it on a 10g? Absolutely not. I have this on a 3g tank that has a betta and a couple shrimp in it. The flow rate is adjustable. It's quite. It fits a 3g rimless tank! I put a sponge on the intake....cuz shrimpies. I also cut my own sponges I have for other tanks instead of the premade ones. Worked just fine! It's only been up a day. So not sure the longevity of product. Will update if it crashes to quickly.

### ⭐⭐⭐⭐⭐ Easy to use
*by K***N on January 10, 2026*

Very quiet and works well

## Frequently Bought Together

- Penn-Plax Cascade 300 Power Filter – Hang-On Filter with Quad Filtration – Great for Freshwater and Saltwater Setups
- Penn-Plax Cascade 300 GPH Hang On Replacement Media for The Cascade 300 Filter, 3 Pack
- Penn-Plax Cascade 300 GPH Hang On Filter Aquarium Bio Sponge Replacement; 2 Pack

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---

*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-02-05*