SYOSI Aquarium Fish Tank Biochemical Cotton Filter, Nano Bio Sponge Filter, Quiet Betta Fry Shrimp and Small Fish Foam Filter, for Fish Tank Up to 10-20 Gallon, Water Fairy Cotton 3 Pack, XY-2836

🐟【Fine Sponge Filtration】: The 3 filters provide mechanical and biofiltration and trap debris or waste without sucking up your fish, keeping a crystal-clear water tank.
🐠【Mini Size】: They measure 2" D x 6.2" H. Fit for a 10 - 20 gallon small tank. Suitable for the breeding and feeding of various ornamental fish, shrimp, or fish fry.
🐡【Easy to Clean】: Each filter can be easily detached for cleaning the dirt. Rinse it every 2 - 4 weeks with aquarium water ONLY. Avoid washing it in tap water!
🦑【Quiet Aeration】: Air-powered and causing no disturbance to your daily life. Press the sponge into the tank to fully absorb tank water to make it sink to the bottom.
🐙【Air Pump Not Included】: You need an extra air pump to run each filter, which processes external air to promote oxygen circulation, providing a healthier tank environment.