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Product Information
Fluval Aquarium Filter Foam Blocks provide mechanical straining of particulate waste. It prevents particulate waste from prematurely clogging other filter media in the module stack. Although the primary purpose of Fluval Foam is mechanical filtration, biological activity will eventually occur within its pore structure. These Fluval Aquarium Filter Foam Blocks also enhance biological filtration and are suitable for the Fluval 204/205 and Fluval 304/305 Aquarium Filters.

Features include:

• Provides mechanical filtration of large particles
• Prevents premature clogging
• Enhances biological filtration
•2-pack; Suitable for Fluval 204/205 and 304/305 Filters

Product Notes

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Fluval Filter Foam Block 204/205 & 304/305 - 2 pack

112 reviews
$6.99 SALE

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Filter Foam Block 204/205 & 304/305 - 2 pack
Discontinued by vendor
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by PowerReviews
FluvalFilter Foam Block 204/205 & 304/305 - 2 pack

(based on 1 review)

Ratings Distribution

  • 5 Stars



  • 4 Stars



  • 3 Stars



  • 2 Stars



  • 1 Stars



Reviewed by 1 customer

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Great Value and Product

By Animal Care Giver

from WI

About Me Experienced Aquarist

See all my reviews

Verified Buyer


  • Durable
  • Easy To Clean
  • Needs Little Upkeep


    Best Uses

    • Large Tanks
    • Small Tanks
    • Tropical Fish

    Comments about Filter Foam Block 204/205 & 304/305 - 2 pack:

    Keeps our tank clean for up to 2 months.

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