Internal Aquarium Filters

Submersible or internal filters can be used in a way that no other filter can and are designed for entirely different use than another filter type. These submersible filters are placed entirely in the water with no outside parts except the power cord. These filters can be placed on the bottom of an aquarium horizontally, and they can be used in shallow water for half filled turtle or fish aquariums. Fluval and Duetto are two of the big names in internal filtration, offering chemical, biological and mechanical filtration in each of their units.

Hydro-Sponge Aquarium Filters

Hydro-Sponge Aquarium Filters

Great for goldfish
Pros: easy to clean, produce little turbulence, stay put
Cons: none
Love these cheap, effective filters. I have one large fantail goldfish in a 29 g with an Aquaclear 30, Aquaclear 50 and this sponge filter all going. Does a great job at collecting debris and is sup...
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Hydro-Sponge Aquarium Filters
Starting At:
$759
Was: $8.99
Save: $1.40
(12 Reviews)
Bio Foam Sponge Aquarium Filters
Starting At:
$749
(4 Reviews)
Cascade Internal Reptile Filters
Starting At:
$1699
(6 Reviews)
Filter Max Aquarium Pre-Filter
Starting At:
$899
(3 Reviews)
Triple Flow Corner Aquarium Filters
Starting At:
$449
(4 Reviews)
Fluval "U" Internal Aquarium Filters
Starting At:
$2999
(7 Reviews)
Quick & Easy Corner Aquarium Filters
Starting At:
$699
(2 Reviews)
Economy Undergravel Aquarium Filters
Starting At:
$999
(1 Review)
Fluval Nano Aquarium Filter
Only:
$1899
(0 Reviews)