Fish Supplies › Penn Plax › 3 in fish tank filters

Penn-Plax Large Fish Tank Divider for Aquariums - Clear Perforated Polymer Screen - 11-3/8 x 11-3/8 Large for 15 - 20 Gallon

Penn-Plax Tank Dividers instantly convert one aquarium into two! Quick and easy to install these polymer screen dividers are great for creating breeding tanks or for separating rough fish. Made to fit most tanks up to 20 gallons in size with dimensions... more

Aqua-Mist Airstone - 7/16 in. - 1 pk - Add Bubbles and Vital Oxygentation to Your Aquarium or Fish Tank

The Aqua-Mist Air Stone is a 7/16 inch green colored aerator for your tank. When added to your aquarium it produces a steady flow of bubbles providing a better supply of oxygen to your fish. It attaches easily to any air pump with standard 3/16’’... more

Penn-Plax Small World Habitat Lo-Tank Portable & Transparent Tank 2.3 gall

Small World Habitat presents the 2.3 Gallon Lo-Tank by Penn-Plax. This enclosure is the perfect home or nursery for hamsters gerbils fish frogs snakes newts hermit crabs bugs or any other type of small animal. Multifunctional: The Small World Habitat... more

Penn Plax Air-tech Aquarium Air Pump – Single Outlet – Fish Tanks Up To 30 Gallons | 2.25 H x 4 W x 3.25 D in | Wayfair AT2K3

The AT2K3 Air-Tech model quietly aerates and oxygenates fish tanks up to 30 gallons in size. It comes equipped with a single outlet that accepts standard 3/16” airline tubing. It also provides constant air flow, and is safe for both freshwater and... more

Penn Plax 20 Power Hang-On Aquarium Filter, Crystal in Black/Blue | 4.5 H x 3.75 W x 3 D in | Wayfair CPF6

The Cascade 20 quietly delivers crystal clear water and pushes water at 20 Gallons per Hour (GPH) for tanks up to 7 Gallons in size. It’s great for Freshwater and Saltwater Aquariums. Accommodating: The adjustable flow knob allows for increased or... more

Cube Hideaways, 4.25" L X 4.5" W, Pack of 3, Medium, Brown

Penn-Plax's cubes offers visual interest to your tank while reducing fish stress. It features swim throughs and hideaways for small and medium sized fish. This will make a great addition to any tank. more

Penn-Plax Quick Net Aquarium Fish Net Durable Netting 3 x 2.25 10 Handle

The Penn-Plax Aquarium Fish Net is a must have addition to any home aquarium. This 3 inch fish net is made of fine nylon and will not hurt the fish in your tank. The Aqua-Blue color of the fish net blends in with the water allowing fish to be scooped... more

Penn-Plax Cascade 1200/1500 GPH Canister Filter Aquarium Bio Sponge Replacement; 1 Pack

The Penn Plax Cascade 1200/1500 GPH Canister Filter Aquarium Bio Sponge keeps the water in your aquarium clean and clear. This Cascade filter sponge removes ammonia and nitrites from the water keeping your fish tank healthy; clean; and odor free. This... more

Penn Plax Betta Bow-Front Kit 7.5L x 3.25W x 5.5H

Bettas are by far the most popular fish for beginners and pros because they re so animated colorful and easy to care for. But they tend to fight each other. The Betta Bow-Front Fish Tank solves this problem by keeping your bettas separate safe and... more

Penn Plax AS2 Aqua Mist Air Stone Add-A-Stone - 2 x 10 in.

The Penn Plax Aquarium Air Stone provides the necessary oxygenation to your fish tank with a steady stream of bubbles. Attach this air stone to any standard 3/16 airline tubing (sold separately) and it’s ready to use. For larger tanks multiple air... more

Penn-Plax Colorful Aquarium Plastic Plant Pack 8-Inch

This colorful 3 pack plastic plant bundle will instantly add color and fun to your aquarium. Your fish will enjoy swimming between and through these plants and you can enjoy the colorful look. Designed to be safe for freshwater or saltwater tanks. more

Penn-Plax Air-Tech Aquarium Air Pump – Single Outlet – Blue – up to 30 Gallons

Penn-Plax presents the impressively quiet line of Air-Tech Aquarium Air Pumps. The AT2K3 model quietly aerates and oxygenates fish tanks up to 30 gallons in size. It comes equipped with a single outlet that accepts standard 3/16� airline tubing. It... more

Penn-Plax Air-Tech Aquarium Air Pump – Single Outlet – Blue – up to 20 Gallons

Penn-Plax presents the impressively quiet line of Air-Tech Aquarium Air Pumps. The AT2K2 model quietly aerates and oxygenates fish tanks up to 20 gallons in size. It comes equipped with a single outlet that accepts standard 3/16� airline tubing. It... more

Penn-Plax Air-Tech Aquarium Air Pump – Double Outlets – Blue – up to 55 Gallons

Penn-Plax presents the impressively quiet line of Air-Tech Aquarium Air Pumps. The AT2K4 model quietly aerates and oxygenates fish tanks up to 55 gallons in size. It comes equipped with 2 outlets that accept standard 3/16� airline tubing. It also... more

Penn-Plax Silent-Air X4 Aquarium Air Pump – Double Outlet – Blue – up to 55 Gallons

Penn-Plax presents the impressively quiet line of Silent-Air Aquarium Air Pumps. The X4 model quietly aerates and oxygenates fish tanks up to 55 gallons in size. This model comes equipped with 2 outlets that accept standard 3/16� airline tubing. It... more

Penn Plax AS6T Twin Pack 7/16 Aqua-Mist Air Stone Cylinders

Each Aqua-Mist Air Stone is a 7/16 inch green colored aerator for your tank. When added to your aquarium it produces a steady flow of bubbles providing a better supply of oxygen to your fish. It attaches easily to any air pump with standard 3/16’’... more

Penn Plax Aquarium Filter Wood (best for furniture style stands) in Black/Brown | 0.2 H x 6 W x 5.3 D in | Wayfair ONF4

Cascade presents the Powered Aquarium Nano Sponge Filter by PENN-PLAX. This sponge filter is specifically designed for aquariums that house fry, shrimp, and small fish. The two-ribbed sponges trap floating debris without sucking up smaller or weaker... more

Penn Plax Cascade 600 Fully Submersible Internal Aquarium Filter, Crystal in Black/Blue | 11.5 H x 3 W x 4 D in | Wayfair CIF3

In addition to delivering crystal-clear water throughout the aquarium. This filter cycles water at 175 Gallons per Hour (GPH) for tanks up to 50 gallons in size. It’s great for freshwater and saltwater aquariums, along with a variety of terrarium... more

Penn Plax Deco-replicas Sapphire Crystal Cave Aquarium in Blue | 3.5 H x 4.75 W x 3.5 D in | Wayfair RR3045

Add some sparkles and shine to your fish tank with this colorful piece! This translucent, sapphire blue aquarium decoration features a swim-though that doubles as a hiding space, which helps reduce fish stress and boredom. It’s also perfect for... more

Penn Plax Novelty Aquarium Decoration Wood (best for furniture style stands) in Brown | 1 H x 3.8 W x 8.3 D in | Wayfair RR971

The Striped Sail Shipwreck Aquarium Ornament adds a colorful exciting underwater shipwreck theme to your fish tank. This ornament replicates a sunken ship that lays on a rock deep in the ocean waiting to be discovered. The vibrant red, white, and green... more

Penn Plax Aquarium Accessory | 3.5 H x 2.5 W x 2.5 D in | Wayfair BSHRB1

Bring some joy and doo doo doo doo doo doo into your fish tank with some Baby Shark! These small, double-sided aquarium ornaments are great for decorating a child’s fish tank, especially if they love singing along to the catchy tune! This 2-Piece... more

Penn Plax Rectangle Aquarium Decoration Wood (best for furniture style stands) in Blue/Brown | 1 H x 11.5 W x 4.3 D in | Wayfair FDK108

The Finding Dory 0.5 Gallon Betta Tank Kit is a themed aquarium setup inspired by the Disney sequel "Finding Dory." It's designed as a small and compact aquarium suitable for keeping a Betta fish, which are known for their vibrant colors and character.... more

Penn Plax Age-of-Magic Aquarium Decorations Aquarium Accessory | 8 H x 5.25 W x 3.75 D in | Wayfair RRW12

Add some whimsical charm and wonder to your fish tank with this fully detailed aquarium decoration. This fully colored aquatic ornament features a medium castle perched upon a rocky hill, with a cone-shaped roof, towers, archways, and stone details... more