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Penn Plax & Nature's Playland

Smallworld SWF-1 Cartridges

For carefree maintenance, healthy fish, and crystal-clear water. Authentic carbon/zeolite/foam replacement cartridges for all Penn Plax and Nature's Playland Smallworld filters.

Smallworld SWF2C Cartridges

For carefree maintenance, healthy fish, and crystal-clear water. Authentic carbon/zeolite/foam replacement cartridges for all Penn Plax and Nature's Playland Smallworld filters.

Clear-Free Filter Cartridges - Regular - 2-pack

Replacement cartridges for the Penn Plax Clear-Free I (small model) Air Cartridge filter. Model # Q-CF1. 2 cartridges per package.

Clear-Free II Filter Cartridges - Large - 2 pack

Replacement cartridges for the Penn Plax Clear-Free II (large model) Air Cartridge filter. Model # Q-CF2. 2 cartridges per package.

Sand Shark Filter Cartridges (2-pack)

Replacement filter cartridge inserts for the Penn Plax Sand Shark Filter.

Cascade 100 Carbon Filter Cartridges

Replacement disposable floss/carbon filter cartridges for the Penn Plax Cascade 100 filter.

Cascade 300 Internal Carbon Filter Cartridges

Replacement disposable carbon filter cartridges for the Penn Plax Cascade 300 Internal filter.

Cascade 400 Internal Bio-Sponge

Replacement Bio-Sponge filter cartridges for the Penn Plax Cascade 400 Internal filter.

Cascade 500 Canister Filter Bio-Floss

Replacement Bio-Floss filter pads for the Penn Plax Cascade 500 Canister filter.

Cascade 700 & 1000 Canister Filter Bio-Floss

Replacement Bio-Floss filter pads for the Penn Plax Cascade 700 and 1000 Canister filters.

Cascade 600 Internal Bio-Sponge

Replacement Bio-Sponge for the Penn Plax Cascade 600 Internal filter.

Cascade 400 Internal Carbon Filter Cartridges

Replacement disposable carbon filter cartridges for the Penn Plax Cascade 400 Internal filter.

Cascade 600 Internal Carbon Filter Cartridges

Replacement disposable carbon filter cartridges for the Penn Plax Cascade 600 Internal filter.

Cascade 150 & 200 Bio-Sponge

Replacement Bio-Sponge for the Penn Plax Cascade CPF3 150 and CPF4 200 aquarium filters.

Cascade 150 & 200 Disposable Filter Cartridges

Replacement disposable floss/carbon filter cartridges for the Penn Plax Cascade CPF3 150 and CPF4 200 aquarium filters.

Pro-Z Ammonia Removing Zeolite Crystals

Laboratory quality ammonia removing crystals remove ammonia from your aquarium. Contains zeolite, which has been proven to remove ammonia from tank water.