Hydra Aquatics

Sponge Filter

Grouped product items
Sponge Filter - 5 Gallon

SKU: 209399

In stock

$4.39 $4.39

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Sponge Filter - 10 Gallon

SKU: 209400

In stock

$5.69 $5.69

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Sponge Filter - 20 Gallon

SKU: 209401

In stock

$6.59 $6.59

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Sponge Filter - 30 Gallon

SKU: 209402

In stock

$8.99 $8.99

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Sponge Filter - 50 Gallon

SKU: 209403

In stock

$10.39 $10.39

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Sponge Filters are great to have on hand for quarantine tanks, hospital tanks, and really any other time you may have a temporary tank set up to hold livestock. By hooking an air pump up to the sponge filter, and placing at the bottom of the aquarium, water will be drawn into the sponge allowing mechanical and biological filtration to take place. The air bubbles floating upward will give you water movement and oxygen exchange, making the use of a propeller style powerhead unnecessary


Quarantine is a necessity in the saltwater aquarium hobby and having the necessary equipment can make or break the process. Foam Sponge Filters are one of the necessary items for a quarantine/hospital tank as it will trap detritus as well as help establish a bacterial colony to help with biological filtration. You can keep the sponge in the display tank until ready for use in a quarantine tank. By keeping the sponge in an active tank will help seed the bacteria onto the sponge and help prevent a nitrogen cycle in the quarantine tank from taking place.

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Product Questions

Sponge Filter - Hydra Aquatics

How about dimension for 30 Gal and 50 Gal each?
Question by: LEE on Nov 5, 2021, 1:33 AM
The 30 Gallon sponge is 3 x 4 x 4 inches;

The 50 gallon sponge is 4.75 x 4.75 x 8.25 inches
Answer by: Matt Lucero (BRS Staff) on Nov 5, 2021, 8:38 AM
Can you tell me the dimensions in inches of the SPONGE FILTER - 10 GALLON
Question by: John franz on Feb 9, 2019, 4:32 PM
3.5" x 4"
Answer by: Mark Schlough on Feb 19, 2019, 12:13 PM
What is needed to make this work? I'm assuming a pump of some sort. No size is listed for tubing so I don't know what to order to make it work. thanks
Question by: Steve on Jun 7, 2016, 3:21 PM
Great question!
These are designed for use with an air pump as the main source. You may be able to modify some 5/8" tubing to fit around the out side of the sponge filter clear tubing adapter.
Answer by: Connor on Jun 7, 2016, 4:55 PM