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Oxygen Plus Bio-Filter 11 Repl. Sponge (2-3/4" dia x 1-1/2" tall)

Oxygen Plus Bio-Filter 11 Repl. Sponge (2-3/4" dia x 1-1/2" tall)

These 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...

$2.99

at Drs. Foster & Smith

Oxygen Plus Bio-Filter 8 Repl. Sponge (2-1/2" dia x 3-1/2" tall)

Oxygen Plus Bio-Filter 8 Repl. Sponge (2-1/2" dia x 3-1/2" tall)

These 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... ... more

Oxygen Plus Bio-Filter 8 Repl. Sponge (2-1/2" dia x 3-1/2" tall)

These 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...

Drs. Foster & Smith

(225,000+)

$3.99

go to store
Oxygen Plus Bio-Filter 2 Repl. Sponge (2-1/4" dia x 2-1/4" tall)

Oxygen Plus Bio-Filter 2 Repl. Sponge (2-1/4" dia x 2-1/4" tall)

These 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... ... more

Oxygen Plus Bio-Filter 2 Repl. Sponge (2-1/4" dia x 2-1/4" tall)

These 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...

Drs. Foster & Smith

(225,000+)

$4.99

go to store