What is the purpose of the Clear-Free Premium Under Gravel Filter?

The filter is designed to cycle crystal clear water throughout your aquarium while keeping a neat look inside.

Does the Clear-Free Premium Under Gravel Filter provide aeration as well?

Yes, the filter is air driven and simultaneously filters and aerates your tank.

What size of aquarium is this filter suitable for?

The filter is suitable for most 15-20 (high) gallon aquariums.

What is the dimension of this filter?

The dimensions are 11.5 x 1.2 x 23 inches connected.

Should colored fish gravel be put on top of the filter?

Yes, colored gravel can be used, but use water treatment stuff to prevent it from being cloudy.

Would this work for a 60-gallon tank?

No, this filter is designed for 20-gallon tanks and would be too small. There are larger sizes available for bigger tanks, measure the width and depth of your aquarium and compare it to the assembled width and depth of the undergravel filter to decide.

How do you remove the fish poo from under the filter plates?

Use a syphon to clean the gravel when you do a water change to clean the gravel. Clean 1/4 of the bottom every week to clean the whole bottom of the tank after a month.

Can I use this filter with aquarium sand?

Yes, you can use sand, dirt or clay, but you need to cover the filter with a weed barrier cloth to avoid the sand falling through.

Can I use this underground filter with no gravel?

No, this filter requires gravel to hold it in place.

Can it be used as a plenum system?

Yes, adjust the air flow from your air pump accordingly.

What is the replacement carbon undergravel filter cartridge replacement number?

Sorry, I don't know the replacement number. I use power heads with these filters.

Can I use decorative glass beads as floor?

No, the best bottom material should be about the size of rice with this filter.

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Penn-Plax

Penn-Plax Undergravel Aquarium Filter for 15-20 (high) Gallon Tanks – Two 11.2” x 11.25” Plates – Under Gravel System for Clear, Clean Water – Safe for Freshwater and Saltwater Tanks

Name: Penn-Plax Undergravel Aquarium Filter for 15-20 (high) Gallon Tanks – Two 11.2” x 11.25” Plates – Under Gravel System for Clear, Clean Water – Safe for Freshwater and Saltwater Tanks
Uploaded: 2024-04-29T04:23:30.360Z
Description: Penn-Plax Undergravel Aquarium Filter for 15-20 (high) Gallon Tanks – Two 11.2” x 11.25” Plates – Under Gravel System for Clear, Clean Water – Safe for Freshwater and Saltwater Tanks

Item #:9138371

4.4 rating

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PKR 5025PKR 5252 You Save : 4%
Price Detail
Price
PKR 5025
Excluding Shipping & Custom charges
( Shipping and custom charges will be calculated on checkout )
* All items will be imported from US Store

Order now and get it around Tuesday, May 14

Availability : In Stock

Imported from USA store

Quantity :

Ships from Ubuy, Sold By :

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The Clear-Free Premium Under Gravel Filter is air driven and utilizes an Air Pump (not included) to cycle crystal clear water throughout your aquarium

Product Details

NOTHING LIKE OLD SCHOOL: The Clear-Free Premium Under Gravel Filter is air driven and utilizes an Air Pump (not included) to cycle crystal clear water throughout your aquarium, while keeping a crisp and neat look inside. This means there’s less “moving parts,” making for simplistic and easy maintenance. This filter is suitable for most 15 – 20 (high) gallon aquariums.
BIOLOGICAL, CHEMICAL, AND PHYSICAL FILTRATION: As air is pushed through the Air Stones and rises through the Lift Tubes, water is gently suctioned through gravel and the filter plates, allowing both air and water to pass through the Filt-a-Carb Activated Carbon Cartridges. When water continues to be drawn through, anaerobic bacteria collects and colonizes within the gravel and filter plates.
ALSO AERATES YOUR TANK: Since the Clear-Free Premium Under Gravel Filter is air driven through the use of Air Stones and an Air Pump (not included), it also aerates your tank. In essence, your aquarium is being filtered and aerated at the same time, though the same system! It’s a filter and bubbler in 1!
ITEMS INCLUDED: The Clear-Free Premium Under Gravel Filter includes 2 Filter Plates, 2 Adjustable Lift Tubes, 2 Straight Airline Tubes, 3 Filter Plate Connecters, and 2 Replaceable Filt-a-Carb Activated Carbon Media Cartridges.
MEASUREMENTS: Each Filter Plate Separately = 11.25” (W) x 11.2” (D) / Filter Plates Together = 22.5” (W) x 11.2” (D) / Each Lift Tube at Filter Plate Base = 12” – 15”
COLOR MAY VARY: Please note: the plates that go on the bottom of your tank beneath a layer of gravel or other substrates may be Blue or Black.

Item Weight	1.00 pounds (0.45 kg)
Manufacturer	Penn Plax, INC.
Country of Origin	China
Item model number	CFU20
Date First Available	January 23, 2008
Item Package Dimensions L x W x H	11.85 x 11.38 x 1.5 inches (30.1 x 28.9 x 3.8 cm)
Item Dimensions LxWxH	22.5 x 11.2 x 16.25 inches (57.1 x 28.4 x 41.3 cm)
Brand	Penn-Plax
Target Audience Keyword	newts, hermit-crabs, beetles, geckos, insects, spiders, betta-fish, lizards, bottom-feeder-fish, arachnids, salamanders, snails, dragonflies, fish, iguanas, rays, ladybugs, algae-eaters, mollusks, tortoises, turtles, butterflies, arthropods, reptiles, bats-animals, sharks, snakes, crabs, goldfish, octopuses, cichlid-fish, invertebrate-fish, bearded-dragons, frogs, bees
Directions	Wash with warm water before placing in aquarium.
Model Name	CFU20
Color	Blue
Size	CFU20 (15 - 20 Gallons)
Material	Crystal
Age Range Description	All Life Stages
Number of Items	1
Style	15 – 20 Gallon
Included Components	2 Filter Plates, 2 Adjustable Lift Tubes, 2 Straight Airline Tubes, 3 Filter Plate Connecters, and 2 Replaceable Filt-a-Carb Activated Carbon Media Cartridges
Specific Uses for Product	Indoor
Is Discontinued By Manufacturer	No
Product Dimensions	22.5 x 11.2 x 16.25 inches; 1 Pounds

Features & Benefits

Air driven filter for crystal clear water
Simplistic and easy maintenance with fewer moving parts
Suitable for most 15 20 gallon aquariums
Provides biological, chemical, and physical filtration
Aerates your tank while filtering
Includes all necessary items for setup

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Customer Questions & Answers

Question : What is the purpose of the Clear-Free Premium Under Gravel Filter?
Answer : The filter is designed to cycle crystal clear water throughout your aquarium while keeping a neat look inside.
Question : Does the Clear-Free Premium Under Gravel Filter provide aeration as well?
Answer : Yes, the filter is air driven and simultaneously filters and aerates your tank.
Question : What size of aquarium is this filter suitable for?
Answer : The filter is suitable for most 15-20 (high) gallon aquariums.
Question : What is the dimension of this filter?
Answer : The dimensions are 11.5 x 1.2 x 23 inches connected.
Question : Should colored fish gravel be put on top of the filter?
Answer : Yes, colored gravel can be used, but use water treatment stuff to prevent it from being cloudy.
Question : Would this work for a 60-gallon tank?
Answer : No, this filter is designed for 20-gallon tanks and would be too small. There are larger sizes available for bigger tanks, measure the width and depth of your aquarium and compare it to the assembled width and depth of the undergravel filter to decide.
Question : How do you remove the fish poo from under the filter plates?
Answer : Use a syphon to clean the gravel when you do a water change to clean the gravel. Clean 1/4 of the bottom every week to clean the whole bottom of the tank after a month.
Question : Can I use this filter with aquarium sand?
Answer : Yes, you can use sand, dirt or clay, but you need to cover the filter with a weed barrier cloth to avoid the sand falling through.
Question : Can I use this underground filter with no gravel?
Answer : No, this filter requires gravel to hold it in place.
Question : Can it be used as a plenum system?
Answer : Yes, adjust the air flow from your air pump accordingly.
Question : What is the replacement carbon undergravel filter cartridge replacement number?
Answer : Sorry, I don't know the replacement number. I use power heads with these filters.
Question : Can I use decorative glass beads as floor?
Answer : No, the best bottom material should be about the size of rice with this filter.
Question : What is the minimum depth of gravel does this require?
Answer : 1 inch is recommended.

Customer Ratings

4.4 out of 5

1219 customers ratings

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3 star
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2 star
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Penn-Plax CFU20 Filter Accessories Editorial Review

The Penn-Plax Clear-Free Premium Under Gravel Aquarium Filter is well received by customers, who found it to be reliable and effective in keeping their freshwater aquariums clean. The filter's dimensions are approximately 11.5 x 1.2 x 23 inches, making it suitable for 15-20 gallon tanks. Users also noted that the filter can be used with colored gravel, sand, or other substrates if adequately covered. However, it was emphasized that the filter is designed for use with gravel, which holds it in place. Additionally, customers mentioned using a syphon to clean the gravel regularly, ensuring the maintenance of a clean tank. Some users paired the undergravel filter with a hang-on-back (HOB) filter for enhanced efficiency, while others found it reliable as a standalone filter. There were contrasting reviews, with some users expressing satisfaction and commenting on the clarity of the water, while others were disappointed with the filter's performance, citing issues with air bubbles and ineffectiveness in filtration.

Pros

Suitable for 15-20 gallon tanks
Can be used with colored gravel or sand if adequately covered
Reliable in maintaining clear water
Can be used with a hang-on-back filter for enhanced efficiency

Important Information

Limitations : For products shipped internationally, please note that any manufacturer warranty may not be valid; manufacturer service options may not be available; product manuals, instructions, and safety warnings may not be in destination country languages; the products (and accompanying materials) may not be designed in accordance with destination country standards, specifications, and labeling requirements; and the products may not conform to destination country voltage and other electrical standards (requiring use of an adapter or converter if appropriate). The recipient is responsible for assuring that the product can be lawfully imported to the destination country. When ordering from Ubuy or its affiliates, the recipient is the importer of record and must comply with all laws and regulations of the destination country.
Not all the products listed on Ubuy are for sale, as Ubuy is a global search engine. Products are subject to export/trade regulations.

Penn-Plax Undergravel Aquarium Filter for 15-20 (high) Gallon Tanks – Two 11.2” x 11.25” Plates – Under Gravel System for Clear, Clean Water – Safe for Freshwater and Saltwater Tanks

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