Aquatop Internal Sponge Filter for Aquariums – Freshwater and Saltwater Use, Compatible with Air Pumps or Powerheads

The Aquatop CAF-25 can be used in systems up to 25 gallons and is simple to install Use it as a stand-alone filter or for breeders and hatcheries; you won't be disappointed with its performance Runs silently Foam materials Support the colonization of beneficial bacteria Allowing for mechanical and biological filtration