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Aquarium Sponge Filters

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Internal Sponge Filter CAF-10

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The CAF-10 is a simple, classic and economical sponge filter for beginner and advanced aquarists alik...

Sponge Filter
Weighted
Up to 10 Gallons
60 Pores/Linear Inch

Was: $3.99

$2.99

Internal Sponge Filter CAF-25

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Sponge filters have been around for decades and there�s a reason these filters are so popular. Sponge...

Sponge Filter
Weighted
Up to 25 Gallons
40 Pores/Linear Inch

Was: $5.99

$4.99

Internal Sponge Filter CAF-40

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With an airlift system, super biochemical sponge filter features silent operation, and has an excelle...

Sponge Filter
Weighted
Up to 40 Gallons
40 Pores/Linear Inch

Was: $6.99

$5.99

Internal Sponge Filter CAF-60

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With an airlift system, super bio-mechanical sponge filter features silent operation, and has an exc...

Sponge Filter
Weighted
Up to 60 Gallons
40 Pores/Linear Inch

Was: $9.99

$7.59

Internal Sponge Filter CAF-180

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For fresh and saltwater systems up to 180 gallons, meet the CAF-180! Simple, economical and so easy t...

Sponge Filter
Weighted
Up to 180 Gallons
35 Pores/Linear Inch

Was: $24.99

$19.99

Internal Sponge Filter CAF-250

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Aquarists have been using sponge filters for decades and there's a reason these simple devices are so...

Sponge Filter
Weighted
Up to 250 Gallons
35 Pores/Linear Inch

Was: $29.99

$26.99

Internal Wall-Mount Sponge Filter SF-XY2830

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The SF Series Wall-Mounted Sponge Filter can be mounted on the wall of your aquarium. The SF-XY2830 u...

Was: $15.99

$7.99

Internal Wall-Mount Sponge Filter SF-XY2831

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The SF Series Wall-Mounted Sponge Filter can be mounted on the wall of your aquarium. The SF-XY2831 u...

Was: $15.95

$6.99

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We have the highest quality sponge filters at the lowest prices! There's a reason these classic "old-school" sponge filters have been around so long--they work like a charm! So shop around; we stock a large selection of aquarium sponge filters at the lowest price.