These sponge filters are 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

Sponge filter is good for aquarium and provides both mechanical and biological filtration The air infusion chamber produces numerous minute bubbles which promote gas exchange and increase dissolved oxygen level in tank water Simply install an airline into the unit and provide both aeration and filtration for your fish The sponge traps large waste particles mechanically and cleans the water without trapping baby fish Product dimensions: 35A wide x 18A deep x 55A high sponge dimensions: 18AD x 312AH They are useful for as breeding filter or as secondary filter Or they can be used as pre-filtration unit by fitting to an external or a top filter Max tank size: good for up to 15 gallon each filter Package includes: 4 pcs of sponge filters in a poly bag