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Penn-Plax presents the Small World Fishbowl Under-Gravel Filter Kit. This kit ... Penn-Plax presents the Small World Fishbowl Under-Gravel Filter Kit. This kit is specifically designed for all drum or round bowls with a 4� or larger opening. If filter plate does not fit through the opening you can break away the outer ring from... more

Provides powerful biological and chemical filtration Trouble free setup and op... Provides powerful biological and chemical filtration Trouble free setup and operation Includes filter plates air stones adjustable lift tubes and filter cartridges Available for 5 10 15/20H 20L/29 40 / 55 gallon aquariums more

Penn-Plax presents the Clear-Free Premium Under Gravel Aquarium Filter. Those ... Penn-Plax presents the Clear-Free Premium Under Gravel Aquarium Filter. Those who’ve been around the aquatic block for a while know that Under Gravel Filters are a testament of time. This Filter is air driven and utilizes an Air Pump (not included)... more

Those who’ve been around the aquatic block for a while know that Under Gravel ... Those who’ve been around the aquatic block for a while know that Under Gravel Filters (UGFs) are a testament of time. This Filter is air driven and utilizes an Air Pump (not included) to cycle crystal clear water throughout your aquarium, while keeping... more

Those who’ve been around the aquatic block for a while know that Under Gravel ... Those who’ve been around the aquatic block for a while know that Under Gravel Filters (UGFs) are a testament of time. This Filter is air driven and utilizes an Air Pump (not included) to cycle crystal clear water throughout your aquarium, while keeping... more

Penn-Plax presents the Clear-Free Premium Under Gravel Aquarium Filter. Those ... Penn-Plax presents the Clear-Free Premium Under Gravel Aquarium Filter. Those who’ve been around the aquatic block for a while know that Under Gravel Filters are a testament of time. This Filter is air driven and utilizes an Air Pump (not included)... more