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Easy-to use biological filter for tropical aquarium fishAquarium filter sponge provides efficient biological filtrationGreat biological filter for breeding or spawning aquariumsThese filters allow you to cultivate nitrifying bacteria for superb biological filtration. Great for fry aquariums and brine shrimp hatcheries because they prevent young fry from being trapped in the filter media. Operates silently, creating numerous minute bubbles for increased oxygen flow. Each requires an air pump and airline tubing, sold separately. Up to 30 gallons. Oxygen Plus Bio-Filter 2 measures 6-11/16" x 9-7/16" high

Easy-to use biological filter for tropical aquarium fishAquarium filter sponge provides efficient biological filtrationGreat biological filter for breeding or spawning aquariumsThese filters allow you to cultivate nitrifying bacteria for superb biological filtration. Great for fry aquariums and brine shrimp hatcheries because they prevent young fry from being trapped in the filter media. Operates silently, creating numerous minute bubbles for increased oxygen flow. Each requires an air pump and airline tubing, sold separately. Up to 30 gallons. Oxygen Plus Bio-Filter 2 measures 6-11/16" x 9-7/16" high

Easy-to use biological filter for tropical aquarium fishAquarium filter sponge for efficient biological filtrationGreat biological filter for breeding or spawning aquariumsThese filters allow you to cultivate nitrifying bacteria for superb biological filtration. Great for fry aquariums and brine shrimp hatcheries because they prevent young fry from being trapped in the filter media. Operates silently, creating numerous minute bubbles for increased oxygen flow. Each requires an air pump and airline tubing, sold separately. Up to 10 gallons. Oxygen Plus Bio-Filter 11 measures 2-3/4" x 3-1/2" high.

Easy-to use biological filter for tropical aquarium fishAquarium filter sponge for efficient biological filtrationGreat biological filter for breeding or spawning aquariumsThese filters allow you to cultivate nitrifying bacteria for superb biological filtration. Great for fry aquariums and brine shrimp hatcheries because they prevent young fry from being trapped in the filter media. Operates silently, creating numerous minute bubbles for increased oxygen flow. Each requires an air pump and airline tubing, sold separately. Up to 10 gallons. Oxygen Plus Bio-Filter 11 measures 2-3/4" x 3-1/2" high.

Easy-to use biological filter for tropical aquarium fishAquarium filter sponge for efficient biological filtrationGreat biological filter for breeding or spawning aquariumsThese filters allow you to cultivate nitrifying bacteria for superb biological filtration. Great for fry aquariums and brine shrimp hatcheries because they prevent young fry from being trapped in the filter media. Operates silently, creating numerous minute bubbles for increased oxygen flow. Each requires an air pump and airline tubing, sold separately. Up to 130 gallon aquariums. Oxygen Plus Bio-Filter 10 measures 3-15/16" x 9" high.

Easy-to use biological filter for tropical aquarium fishAquarium filter sponge for efficient biological filtrationGreat biological filter for breeding or spawning aquariumsThese filters allow you to cultivate nitrifying bacteria for superb biological filtration. Great for fry aquariums and brine shrimp hatcheries because they prevent young fry from being trapped in the filter media. Operates silently, creating numerous minute bubbles for increased oxygen flow. Each requires an air pump and airline tubing, sold separately. Up to 130 gallon aquariums. Oxygen Plus Bio-Filter 10 measures 3-15/16" x 9" high.

Easy-to use biological filter for tropical aquarium fishAquarium filter sponge for efficient biological filtrationGreat biological filter for breeding or spawning aquariumsThese filters allow you to cultivate nitrifying bacteria for superb biological filtration. Great for fry aquariums and brine shrimp hatcheries because they prevent young fry from being trapped in the filter media. Operates silently, creating numerous minute bubbles for increased oxygen flow. Each requires an air pump and airline tubing, sold separately. Up to 30 gallons. Oxygen Plus Bio-Filter 1 measures 6-7/8" x 7-1/2" high

Easy-to use biological filter for tropical aquarium fishAquarium filter sponge for efficient biological filtrationGreat biological filter for breeding or spawning aquariumsThese filters allow you to cultivate nitrifying bacteria for superb biological filtration. Great for fry aquariums and brine shrimp hatcheries because they prevent young fry from being trapped in the filter media. Operates silently, creating numerous minute bubbles for increased oxygen flow. Each requires an air pump and airline tubing, sold separately. Up to 30 gallons. Oxygen Plus Bio-Filter 1 measures 6-7/8" x 7-1/2" high

Clear plastic U-Tube for aquarium wet/dry filter overflow boxes Use as a replacement U-Tube or for custom aquarium plumbing Transport aquarium water to overflow boxes, sump filters and more Maintain proper water flow to your aquarium wet/dry filter overflow boxes. Rigid, plastic U-Tube is perfect as a replacement U-Tube or for custom aquarium plumbing projects. Large diameter U-Tube allows more water to pass through for efficient transportation of aquarium water. Available in 7" high x 1-1/4" diameter and 8" high x 1-1/2" diameter.Use 1-1/2" U-Tube as replacement tube for Eshopps Overflow Box Models PF-300, PF-800, and PF-1000 and PF1200.Use 1-1/4" U-Tube as replacement tube for Eshopps Overflow Box Model PF-1800.Please click on "More Information" for tips on starting an overflow box.

Clear plastic U-Tube for aquarium wet/dry filter overflow boxes Use as a replacement U-Tube or for custom aquarium plumbing Transport aquarium water to overflow boxes, sump filters and more Maintain proper water flow to your aquarium wet/dry filter overflow boxes. Rigid, plastic U-Tube is perfect as a replacement U-Tube or for custom aquarium plumbing projects. Large diameter U-Tube allows more water to pass through for efficient transportation of aquarium water. Available in 7" high x 1-1/4" diameter and 8" high x 1-1/2" diameter.Use 1-1/2" U-Tube as replacement tube for Eshopps Overflow Box Models PF-300, PF-800, and PF-1000 and PF1200.Use 1-1/4" U-Tube as replacement tube for Eshopps Overflow Box Model PF-1800.Please click on "More Information" for tips on starting an overflow box.