Fluval U3 Foam Pad Filter Media

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Keep your Fluval U3 Underwater Filter working effectively and remove large debris with Fluval U3 Foam Pad Filter Media. Fluval U3 Foam Pad Filter Media fits inside the filter chamber to prevent debris bypass for optimal mechanical filtration. Debris like fish waste, uneaten food and other material can cause harmful toxins like ammonia and phosphate to build up in your aquarium. The foam pad has a pore size that facilitates efficient water flow with less clogging, providing long-lasting filtration for cleaner, clearer water.

Key Benefits
  • Captures large particles and debris for effective mechanical filtration.
  • Custom-made to fit perfectly inside the filter chamber to prevent debris bypass.
  • Helps prevent harmful ammonia and phosphate build up in your aquarium by eliminating fish waste, uneaten food, and other organic material.
  • Ideal pore size for efficient water flow, less clogging and long-lasting filtration.
  • For freshwater and marine environments.

HAZARDS TO HUMANS: Always disconnect appliances in the aquarium from the electrical supply before placing hands in the water, before putting on or taking off parts, and whenever the filter equipment is being installed, maintained or handled. Following a routine maintenance schedule will result in a healthier aquarium and extend the life of the filter. Fluval filters have been designed to facilitate these tasks as they can be done within a matter of minutes. For best results, please follow our maintenance schedule recommendations.

Compatible with this Fluval Underwater Filter.

See all items by Fluval

  • Item Number
  • Aquarium Type
    Freshwater, Saltwater
  • Fish Type
    Tropical Freshwater, Marine Fish
  • Material
  • Replace Alternate Foam Pads every 3 - 6 months.

  • Do not replace all Filtration Cartridges at the same time. Alternate Filter Cartridge changes so that some older cartridges remain in use. This ensures the re-seeding of beneficial bacteria, so that colonies discarded with older cartridges will be replaced by vigorous new ones. To enhance bacterial action, pour a dose of biological aquarium supplement onto your Filter Cartridges each time you change the media.

  • Unplug the power cord.

  • Open the filter cover (to make the operation easier and in case the filter is positioned under an aquarium frame, tilt the filter forward until it stops but make sure there is enough electrical cord to allow the filter to pull forward).

  • Slide the Foam Cartridge Frames out of the filter body. Keeping them vertical to avoid releasing the debris collected inside the debris receptacle. Place them in an empty bucket.

  • Remove the poly/carbon cartridge from the cartridge frame.

  • Remove the foam. Rinse the debris receptacle and the foam pads using water taken from the aquarium or replace one of the foams following the recommended replacement schedule. Do not use tap water as this will kill the beneficial bacteria in your foam. Note: Never use soap or detergents as these products could be harmful to the inhabitants of your aquarium.

  • Replace the foam pad. Make sure the foam is positioned behind the tabs on the sides of the frame.

  • With the carbon side facing out, re-insert the poly/carbon cartridge by inserting the lower end of the cartridge into the lower end of the cartridge frame then snapping the top side of the cartridge under the two tabs on the top side of the frame. Do not press too hard, as the cartridge must sit on the top of the tabs on the sides of the frame. Hint: For best results, replace 1 poly/carbon cartridge every 2 weeks.

  • Slide the BioMAX cartridge out and place it in the sink or bucket.

  • Pull open the tab on the side of the cartridge, opening the cover. Rinse the BioMAX with aquarium water, never tap water, or replace half the quantity every 5-6 months. Never replace all the BioMAX nodes at one time, as valuable colonies of beneficial bacteria would be lost.

  • After rinsing, put the BioMAX back in the cartridge and close the cover. For best results, completely fill the cartridge.

  • Re-insert the Foam Cartridge Frames into the filter with the poly/carbon pad facing inwards. Re-insert the BIOMAX cartridge into the filter making sure to properly align the hole at the bottom of the cartridge directly on the top of the impeller opening. Close the filter cover and if required, snap the filter body back into position on the filter bracket.

Rating: 5.0 of 5 stars 3 Reviews 3 Reviews 5 out of 5 Stars

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  • 5 out of 5 stars

    love this filter

    By turtle on Sep 3, 2020

    My turtles produce a lot of waste and with this filter and foam pads are the best my water has never been clearer

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  • 5 out of 5 stars

    works great

    By yeet on Aug 6, 2018

    great price for an amazing product, i love fluval and this helps keep my tank crystal clear

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  • 5 out of 5 stars

    Fluval u3 foam pad.

    By Sergio on Dec 22, 2017

    It grabs all the junk in the tank and is amazing with bacteria.

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