Penn Plax Cascade 300 Power Filter Replacement Bio-Sponge 2-Pack

Penn Plax 12-Pack Cascade Filter Replacement Cartridges for 300 Hang-On Power Filters

Penn Plax CPF5C Cascade 300 GPH Hang On Aquarium Filter Cartridges with Activated Carbon; 1 Pack

(3 Pack) Penn Plax Cascade Power Aquarium Filters Bio-Sponge 300

Penn Plax Cascade 300 GPH Bio Sponge

Penn Plax Cascade Hang-on Power Filter Replacement Cartridges - Pack of 1 (3 count) - CPF34C3

Seachem Prime 500ml

Penn Plax CPF5C3 Fits CPF5 Filter 3 Pack

AquaClear 110 Foam Insert

API STRESS COAT Aquarium Water Conditioner 16-Ounce Bottle

Penn Plax Cascade 300 Internal Bio Sponge Filters (3 Pack)