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Fish Tank Supplies > Fish Tank Filter Accessories > Fish Tank Filter Media > Biological Filter Media > Foam Block and Insert

Foam Inserts and Blocks for Biological Filters


These foam blocks and inserts were made to fit specific aquarium filter models (you can also shop by brand). Foam blocks and inserts function as biological and mechanical filter media (for more foam media check our mechanical media; we also have stand-alone sponge filters). If you plan to use foam for your primary biological media, make sure you use something else as your primary mechanical filter media (another sponge works) so that you're filtering out large particles before they clog your bacterial bed.


Aqua Clear 30 (Old 150) Foam Block 1pk
Aqua Clear 20 (Old Mini) Foam Block 1pk
Aqua Clear 50 (Old 200) Foam Block 1pk
Aqua Clear 70 (Old 300) Foam Block 1pk
Aqua Clear 30 (Old 150) Foam Block 1pk

$1.51
Aqua Clear 20 (Old Mini) Foam Block 1pk

$1.01
Aqua Clear 50 (Old 200) Foam Block 1pk

$0.82
Aqua Clear 70 (Old 300) Foam Block 1pk

$2.02
Aqua Clear 110 (Old 500) Foam Block 1pk
Fluval Filter Foam Block 104 2pk
Fluval Filter Foam Block 204/304 2pk
Fluval Filter Foam Block 404 2pk
Aqua Clear 110 (Old 500) Foam Block 1pk

$5.53
Fluval Filter Foam Block 104 2pk

$3.04
Fluval Filter Foam Block 204/304 2pk

$3.54
Fluval Filter Foam Block 404 2pk

$4.05
Fluval 2 "Plus" Foam Insert 4pk
Fluval 3 "Plus" Foam Insert 4pk
Fluval 4 "Plus" Foam Insert 4pk
Poly Pads for Fluval 4 "Plus" 4pk
Fluval 2 "Plus" Foam Insert 4pk

$3.58
Fluval 3 "Plus" Foam Insert 4pk

$5.07
Fluval 4 "Plus" Foam Insert 4pk

$5.76
Poly Pads for Fluval 4 "Plus" 4pk

$4.87
Fluval Filter Foam Block for FX5
Fluval Edge Foam and Bio Max Filter Media Set
Ovation 210 Replacement Media - 1 pk
Ovation 380 Replacement Media - 1 pk
Fluval Filter Foam Block for FX5

$12.17
Fluval Edge Foam and Bio Max Filter Media Set

$3.04
Ovation 210 Replacement Media - 1 pk

$4.17
Ovation 380 Replacement Media - 1 pk

$4.58
Ovation 700 Replacement Media - 1 pk
Ovation 1000 Replacement Media - 1 pk
Pure Power Multi-Use Poly Filtration Pad - 13 in. x 13 in.
Fluval Bio-Foam for 106 & 206
Ovation 700 Replacement Media - 1 pk

$4.99
Ovation 1000 Replacement Media - 1 pk

$6.21
Pure Power Multi-Use Poly Filtration Pad - 13 in. x 13 in.

$6.42
Fluval Bio-Foam for 106 & 206

$3.04
Fluval Bio-Foam for 306 & 406
Fluval Bio-Foam for 306 & 406

$4.43

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