Penn Plax Premium Under Gravel Filter System - for 40-55 Gallon Fish Tanks & Aquariums, Blue (CFU55)

['Undergravel filter system includes 4 filter plates (each measuring 11.5" X 11.5") with extra large 1 inch adjustable lift tubes.', 'Filter is suitable for most 40 and 50 gallon aquariums. Clips to hold each section securely together are included.', '2 carbon filter cartridges remove odors, and water discoloration by trapping the pollutants in the pores of the carbon.', 'This undergravel filter hides from view for maximum aesthetics. Safe for use in both freshwater and saltwater tanks.', 'Effortless setup and easy maintenance make this premium undergravel filter a must have for all home aquariums. \xa0Simply place filter plates at the bottom of the tank and cover with gravel.']

Retail Price: $ 20.99

Wholesale Price: Inquire Now

aquarium filter under gravel undergravel fish tank water

Penn-Plax, manufacturer & distributor of top Pet Supplies.

clear-free Premium Undergravel Filter

Satisfaction Guaranteed
100% Money Back Guarantee

Penn-Plax Clear Free Premium Undergravel Filter

Powerful and efficient filtration for aquariums 5-55 gallons in size

Convenient, trouble free maintenance.

Provides powerful biological and chemical filtration
Trouble free setup and operation
Includes filter plates, air stones, adjustable lift tubes and filter cartridges
Available for 5, 10, 15/20H, 20L/29, 40 / 55 gallon aquariums


Jumbo 1” Lift Tubes Our jumbo 1” lift tubes provide maximum surface area for efficient filtration. Lift tubes are fully adjustable to provide a custom filtration solution for your aquarium.	Filt-A-Carb Cartridges Our exclusive Filt-A-Carb filter cartridges provide efficient chemical filtration. Each cartridge provides crystal clear water in your aquarium for 6-8 weeks and they can be changed in seconds	Plates Securely Lock Together Clear Free filter plates lock securely together and prevent gravel from falling beneath the filter plates.	High Pore Air Stones The Clear Free line of undergravel filters use our high pore air stones which provide a strong, steady flow of air which powers the filter.

undergravel under water filter filtration

Penn-Plax Clear Free Undergravel Aquarium Filter

Penn-Plax Clear Free undergravel aquarium filters provide your aquarium with crystal clear filtered water, without any of the headaches typically associated with more 'high tech' filters.

Every Clear Free undergravel filter includes heavy duty filter plates that lock together for maximum stability. The jumbo 1” adjustable lift tubes and high pore air stones provide efficient, powerful filtration and can be adjusted up or down for a custom fit. All Clear Free filters also include a free set of Penn-Plax Filt-a-Carb carbon filter cartridges.

Clear Free filters can be assembled in about five minutes. Once assembled, all you’ll need to do is hook your new filter up to an air pump or powerhead to provide powerful, efficient filtration.

Instructions For Use

Clear Free undergravel filters can be assembled and installed in your aquarium in just a few minutes. Be sure to carefully remove the product’s packaging as installation instructions are printed on the reverse side of the packaging.

To assemble your new filter, simply attach the plates together, assemble the lift tubes, attach the lift tubes to the filter plates and add the whole filter to your aquarium. Next, connect each lift tube to an air pump to power the filter.


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Model Number	CFU5	CFU10	CFU20	CFU29	CFU55
Aquarium Size	5 Gallon Tank	10 Gallon Tank	15 Gallon Tank or 20 Gallon High	20 Gallons (L) - 29 Gallons	40 Gallon Tank 55 Gallon Tank
Total Dimensions	15.5”L x 7.5”W	19”L x 9.5”W	23”L x 11.5”W	28.5”L x 11.5”W	46”L x 11.5”W
Individual Plate Size	7.5'' x 7.5''	9.5'' x 9.5''	11.5'' x 11.5''	14.25'' Long x 11.5'' Wide	11.5'' x 11.5''
# of Plates Included	2	2	2	2	4

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Penn Plax Premium Under Gravel Filter System - for 40-55 Gallon Fish Tanks & Aquariums, Blue (CFU55)

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Product introduction

Shipping Notices

The Penn Plax Penn Plax Undergravel Filter combines the function of a traditional filter while offering maximum viewing since it’s hidden out of sight. Designed for 40 to 50 gallon fish tanks, this undergravel filter uses mechanical, chemical, and biological filtration to filter harmful pollutants from your aquarium. Undergravel filters create the most natural bacteria bed for fish tanks and provide effective aerobic filtration. Included are 4 filter plates (each measuring 11.5" X 11.5") with extra large 1 inch adjustable lift tubes. These lift tubes carry bubbles from the bottom of the aquarium to the top creating a gentle flow of water through the gravel and up the lift tube. Designed with narrow slat openings, the gravel is prevented from falling through to filter cartridge. Air pump and airline tubing not included.

From the manufacturer

Penn-Plax, manufacturer & distributor of top Pet Supplies.

clear-free Premium Undergravel Filter

Satisfaction Guaranteed
100% Money Back Guarantee

Penn-Plax Clear Free Premium Undergravel Filter

Powerful and efficient filtration for aquariums 5-55 gallons in size

Convenient, trouble free maintenance.

Provides powerful biological and chemical filtration
Trouble free setup and operation
Includes filter plates, air stones, adjustable lift tubes and filter cartridges
Available for 5, 10, 15/20H, 20L/29, 40 / 55 gallon aquariums


Jumbo 1” Lift Tubes Our jumbo 1” lift tubes provide maximum surface area for efficient filtration. Lift tubes are fully adjustable to provide a custom filtration solution for your aquarium.	Filt-A-Carb Cartridges Our exclusive Filt-A-Carb filter cartridges provide efficient chemical filtration. Each cartridge provides crystal clear water in your aquarium for 6-8 weeks and they can be changed in seconds	Plates Securely Lock Together Clear Free filter plates lock securely together and prevent gravel from falling beneath the filter plates.	High Pore Air Stones The Clear Free line of undergravel filters use our high pore air stones which provide a strong, steady flow of air which powers the filter.

Penn-Plax Clear Free Undergravel Aquarium Filter

Penn-Plax Clear Free undergravel aquarium filters provide your aquarium with crystal clear filtered water, without any of the headaches typically associated with more 'high tech' filters.

Clear Free filters can be assembled in about five minutes. Once assembled, all you’ll need to do is hook your new filter up to an air pump or powerhead to provide powerful, efficient filtration.

Instructions For Use


	click here	click here	click here	click here	click here
Model Number	CFU5	CFU10	CFU20	CFU29	CFU55
Aquarium Size	5 Gallon Tank	10 Gallon Tank	15 Gallon Tank or 20 Gallon High	20 Gallons (L) - 29 Gallons	40 Gallon Tank 55 Gallon Tank
Total Dimensions	15.5”L x 7.5”W	19”L x 9.5”W	23”L x 11.5”W	28.5”L x 11.5”W	46”L x 11.5”W
Individual Plate Size	7.5'' x 7.5''	9.5'' x 9.5''	11.5'' x 11.5''	14.25'' Long x 11.5'' Wide	11.5'' x 11.5''
# of Plates Included	2	2	2	2	4

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