---
product_id: 13023261
title: "Penn Plax Cascade 400 Submersible Aquarium Filter Cleans Up to 20 Gallon Fish Tank With Physical, Chemical, and Biological Filtration, CIF2"
brand: "penn-plax"
price: "€ 114.65"
currency: EUR
in_stock: true
reviews_count: 13
category: "Penn Plax"
url: https://www.desertcart.gr/products/13023261-penn-plax-cascade-400-submersible-aquarium-filter-cleans-up-to
store_origin: GR
region: Greece
---

# 110 GPH flow rate Adjustable directional flow Multi-stage filtration Penn Plax Cascade 400 Submersible Aquarium Filter Cleans Up to 20 Gallon Fish Tank With Physical, Chemical, and Biological Filtration, CIF2

**Brand:** penn-plax
**Price:** € 114.65
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** Penn Plax Cascade 400 Submersible Aquarium Filter Cleans Up to 20 Gallon Fish Tank With Physical, Chemical, and Biological Filtration, CIF2 by penn-plax
- **How much does it cost?** € 114.65 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/13023261-penn-plax-cascade-400-submersible-aquarium-filter-cleans-up-to)

## 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

- • **Crystal Clear Flow:** Quietly pumps 110 gallons per hour for pristine water clarity
- • **Discreet & Versatile:** Fully submersible, compact design fits horizontally and stays hidden
- • **Triple-Action Filtration:** Physical, chemical, and biological filtration for a healthy aquatic environment
- • **Customizable Filter Media:** Large capacity cup lets you tailor filtration to your tank’s unique needs
- • **Directional Water Control:** Adjustable pump head and spray bar for optimal water circulation and aeration

## Overview

The Penn Plax Cascade 400 is a fully submersible aquarium filter designed for tanks up to 20 gallons. Delivering 110 gallons per hour, it combines physical, chemical, and biological filtration with an activated carbon cartridge and internal sponge to ensure crystal clear, toxin-free water. Its adjustable pump head and spray bar optimize water flow and aeration, while the large filter cup allows customization of filter media. Compact and quiet, it fits discreetly in your aquarium setup.

## Description

Penn Plax Cascade 400 Submersible Aquarium Filter Cleans Up to 20 Gallon Fish Tank With Physical, Chemical, and Biological Filtration, CIF2

Review: Pretty good for 10-20 gallon - I've recently upgraded my tank size and changed my filter to a different brand. The time I did use this though it was great. I do plan to use this filter again for an upcoming project that I'm working on so I'm not just throwing it into storage because I really does have good filtration. Like some of the other reviews, I was quick to throw away the carbon cartridge and use my own mixture of media instead. I'm not a fan of carbon which is a heavily debated topic for aquarium enthusiasts. Anyway, pros and cons. Pros: - Works great out of the box and is pretty quite. I slept very easy with the filter on - The attachments are nice to have for multi use cases to ensure you get all the uses you can out of the filter - Cleaning is very easy - The bio sponge is very thick and has a good amount of surface area for beneficial bacteria to grow in. It will probably last you a very long time as long as you clean it properly and don't have any bad water cycles running through it Cons: - The attachments are very cheap feeling - The filter itself feels cheaply constructed so be gentle with it - The suction cups do this filter no justice and pop off easily - The way the filter pulls water in can actually start pulling gunk up into the media chamber past the initial bio sponge so I had to make a black square with my own bio sponge to block any open spots to keep my media clean Despite the cons, for the price: 5/5 all around If you just need a filter to do it's job on a 10-20 gallon tank this is your best bet in terms of having a submersible filter with bio, mechanical, and chemical filtration at this price point. If you are going any larger on tank size I cannot recommend this product line and suggest you look else where. Just my 2 cents.
Review: This Filter Is Wow - My 10 gallon planted tank has horrible substrate that clouds the entire tank up for a week every time I stir anything up. It also had a severe algae problem due to the high light requirements of my plants, overdosing fertilizers, and temporarily being overstocked by my juvenile angelfish. My old filter from a different brand got clogged up with nasty algae and broke, so the tank got really bad in the 2 days it took my to get this new filter. Boy, am I amazed by it! I chose to use the spray bar attachment instead of the jet output, because I didn't want to stir up my plants, and this tank is supposed to be a betta tank. The current is strong enough to gently move the hairgrass but not too strong to blow everything around. I had to remove the middle compartment with the carbon because the filter was just a little too tall for my setup. As you can see, the horrible condition of my tank improved drastically in only 3 days! I believe it's important to note a few of the concerns addressed by other reviewers. 1. The spray bar popping off. I found out that when you first stick it on, the spray bar looks like it is attached, but when you look very close you may notice it's not quite on. Push it harder and you'll hear a click. Now it's very secure and isn't going to pop off any time soon. 2. Fish sucked up through the bottom. This had to be a defective product for those reviewers, because I tried figuring out how such a thing was possible and if the filter is properly assembled and not broken on arrival it is most definitely not possible. The holes in the bottom are no larger than a typical filter input strainer, so if your fish are large enough to not get sucked into a standard filter there is no risk of them getting sucked into this one. Baby fish, yes. My very small neons love to hang out under the filter and they haven't had a problem. I did sadly lose one to a water change siphon a few weeks ago, so I feel if anything's going to be sucked up they are pretty prime candidates. 3. Noise. When my filter came in the mail the carbon compartment had popped open and little pieces of carbon had gotten everywhere, including inside of the impeller compartment. It took a lot of careful disassembling and jiggling for me to get it out, and it was very rattle-y until I did. That may very well have been the problem for those unlucky reviewers as well. This filter is so quiet I can't tell it's on if not for the very nice current it makes. My other tank has significantly louder filters. Overall I think so far this is the best internal filter I've bought, and I've bought 5 different brands over the past 10 years, so that's saying something.

## Features

- Fully submersible aquarium filter quietly delivers 110 gallons per hour of crystal clear water for your fresh or marine aquarium from 10 to 20 gallons in size.
- Activated carbon cartridge removes harmful chemicals, toxins, odors, discoloration, and other contaminants for your aquarium.
- Internal sponge optimizes colonization of beneficial aerobic bacteria. Large capacity aquarium filter cup allows you to choose your own filter medium.
- Pump head with adjustable and directional water flow. Cascade internal filters provide better filtration; physical, chemical and biological while also aerating water.
- Spray bar option allows you to distribute water evenly helping aerate your tank. Fish tank filter can be placed horizontally and is easily hidden.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0002DJLEQ |
| Best Sellers Rank | #40,183 in Pet Supplies ( See Top 100 in Pet Supplies ) #178 in Aquarium Filters |
| Brand | Penn-Plax |
| Brand Name | Penn-Plax |
| Capacity | 20 gallons |
| Customer Reviews | 4.1 out of 5 stars 847 Reviews |
| Global Trade Identification Number | 00030172024320 |
| Included Components | Penn Plax Cascade 400 Submersible Aquarium Filter Cleans Up to 20 Gallon Fish Tank With Physical, Chemical, and Biological Filtration, CIF2 Included Components Penn Plax Cascade 400 Submersible Aquarium Filter Cleans Up to 20 Gallon Fish Tank With Physical, Chemical, and Biological Filtration, CIF2 See more |
| Installation Type | Submersible |
| Item Dimensions L x W x H | 2.75"L x 2.5"W x 9.5"H |
| Item Type Name | Penn Plax Cascade 400 Submersible Aquarium Filter Cleans Up to 20 Gallon Fish Tank With Physical, Chemical, and Biological Filtration, CIF2 |
| Item Weight | 16 ounces |
| Manufacturer | Penn Plax |
| Material | Plastic |
| Material Type | Plastic |
| Model Name | Penn Plax Cascade 400 Submersible Aquarium Filter Cleans Up to 20 Gallon Fish Tank With Physical, Chemical, and Biological Filtration, CIF2 |
| Model Number | CIF2 |
| Number of Items | 1 |
| Part Number | CIF2 |
| Product Dimensions | 2.75"L x 2.5"W x 9.5"H |
| Purification Method | Physical, Chemical, and Biological |
| UPC | 030172024320 |
| Unit Count | 1 Count |
| Warranty Description | Warranty |

## Product Details

- **Brand:** Penn-Plax
- **Material:** Plastic
- **Product Dimensions:** 8"L x 5"W x 2"Th
- **Compatible Devices:** Fresh & Circular System
- **Item Weight:** 16 ounces
- **Global Trade Identification Number:** 00030172024320
- **UPC:** 030172024320
- **Number of Items:** 1
- **Manufacturer:** Penn Plax
- **Product Grade:** New

## Images

![Penn Plax Cascade 400 Submersible Aquarium Filter Cleans Up to 20 Gallon Fish Tank With Physical, Chemical, and Biological Filtration, CIF2 - Image 1](https://m.media-amazon.com/images/I/61O2ymLA8tL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Pretty good for 10-20 gallon
*by M***. on January 27, 2021*

I've recently upgraded my tank size and changed my filter to a different brand. The time I did use this though it was great. I do plan to use this filter again for an upcoming project that I'm working on so I'm not just throwing it into storage because I really does have good filtration. Like some of the other reviews, I was quick to throw away the carbon cartridge and use my own mixture of media instead. I'm not a fan of carbon which is a heavily debated topic for aquarium enthusiasts. Anyway, pros and cons. Pros: - Works great out of the box and is pretty quite. I slept very easy with the filter on - The attachments are nice to have for multi use cases to ensure you get all the uses you can out of the filter - Cleaning is very easy - The bio sponge is very thick and has a good amount of surface area for beneficial bacteria to grow in. It will probably last you a very long time as long as you clean it properly and don't have any bad water cycles running through it Cons: - The attachments are very cheap feeling - The filter itself feels cheaply constructed so be gentle with it - The suction cups do this filter no justice and pop off easily - The way the filter pulls water in can actually start pulling gunk up into the media chamber past the initial bio sponge so I had to make a black square with my own bio sponge to block any open spots to keep my media clean Despite the cons, for the price: 5/5 all around If you just need a filter to do it's job on a 10-20 gallon tank this is your best bet in terms of having a submersible filter with bio, mechanical, and chemical filtration at this price point. If you are going any larger on tank size I cannot recommend this product line and suggest you look else where. Just my 2 cents.

### ⭐⭐⭐⭐⭐ This Filter Is Wow
*by L***. on March 19, 2021*

My 10 gallon planted tank has horrible substrate that clouds the entire tank up for a week every time I stir anything up. It also had a severe algae problem due to the high light requirements of my plants, overdosing fertilizers, and temporarily being overstocked by my juvenile angelfish. My old filter from a different brand got clogged up with nasty algae and broke, so the tank got really bad in the 2 days it took my to get this new filter. Boy, am I amazed by it! I chose to use the spray bar attachment instead of the jet output, because I didn't want to stir up my plants, and this tank is supposed to be a betta tank. The current is strong enough to gently move the hairgrass but not too strong to blow everything around. I had to remove the middle compartment with the carbon because the filter was just a little too tall for my setup. As you can see, the horrible condition of my tank improved drastically in only 3 days! I believe it's important to note a few of the concerns addressed by other reviewers. 1. The spray bar popping off. I found out that when you first stick it on, the spray bar looks like it is attached, but when you look very close you may notice it's not quite on. Push it harder and you'll hear a click. Now it's very secure and isn't going to pop off any time soon. 2. Fish sucked up through the bottom. This had to be a defective product for those reviewers, because I tried figuring out how such a thing was possible and if the filter is properly assembled and not broken on arrival it is most definitely not possible. The holes in the bottom are no larger than a typical filter input strainer, so if your fish are large enough to not get sucked into a standard filter there is no risk of them getting sucked into this one. Baby fish, yes. My very small neons love to hang out under the filter and they haven't had a problem. I did sadly lose one to a water change siphon a few weeks ago, so I feel if anything's going to be sucked up they are pretty prime candidates. 3. Noise. When my filter came in the mail the carbon compartment had popped open and little pieces of carbon had gotten everywhere, including inside of the impeller compartment. It took a lot of careful disassembling and jiggling for me to get it out, and it was very rattle-y until I did. That may very well have been the problem for those unlucky reviewers as well. This filter is so quiet I can't tell it's on if not for the very nice current it makes. My other tank has significantly louder filters. Overall I think so far this is the best internal filter I've bought, and I've bought 5 different brands over the past 10 years, so that's saying something.

### ⭐⭐⭐⭐ One of the better filters I’ve found
*by L***E on May 6, 2024*

I have a Mississippi Map turtle named Blu….after my favorite color and he just looks like a Blu to me…lol!! I got him as a Christmas gift from my sister, which she got one as well. I’ve had him for about 2 years now. I currently upgraded his turtle tank to a 20 gallon, but he’s growing fast, so upgrading to a 40 gallon take is in his near future. The current filter I was using was just ok!! The sponge was on the outside of the filter and everything found it’s way to this sponge. That’s when it happened, it happened…..Blu started picking at, trying to get the leftover food it caught, then when cleaned he started to keep picking at until it was destroyed….lol!! So, I decided to buy a new filter and this one is one of the better ones I’ve found. Listen, I researched and researched many products and reviews of a lot of filters, cause it very important to keep Blu’s tank up to a map turtles standards and care. I was glad that I can still use it when I upgrade his tank. I like the fact that it has an air flow option and a spray option. I was looking to provide aeration in the tank to help keep the tank clearer and to provide some bubbles and flow in the tank. I was surprised how tall it was, because I put it to size it up against the tank, it was maybe not going to work. But, I saw some videos on where to place it. As, you can see from the pictures I had to kind of tilt it so it can be fully immersed in the tank water line. I have basking platform that at the highest point of the tank and if I filled that take up more then the basking area would be underwater, and that was not an option!! I made it work though!! The air flow has three speeds I chose the lowest just to let Blu get used to the filter and the air flow and let’s not forget the BUBBLES!! He loves swimming against the flow and he loves the BUBBLES!! He’s a happy turtle now, it took a couple of days for him to destress from all the new things in his tank!! He’s the cutest and the most playful turtle I’ve ever had!!!

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*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-09-23*