Check the listing for details. CLASSICA AQUARIUM MULTI-LAYER CORNER FILTER. Condition: New. Listed at 7.95 USD. Classica Multi-Layer Corner Filter A simple and efficient filter for aquariums up to 20 gallons Corner Filter Utilizing a specially designed airlift system,the filter oxygenates the water while keeping the water clean. The multi-layered sponge filter combines mechanical and biological filtration to remove organic waste,providing and idea and clean living environent for your fishes.It is suitable for small tropical aquarium setup or breeding tank. Feature and Benefit -An easy and efficient way to increase oxygen supply. -Multi-layered compartments designed for ease of maintenance. -Wide range of application on diffirent filtration installations <img src="https://ti2.auctiva.com/web/aswCredit.gif" border="0"><br><a href="https://pages.ebay.com/seller-center/listing/listing-advanced-sellers/third-party-listing-tools.html#auctiva" target="_blank"><img src="https://ti2.auctiva.com/images/sc1line2.gif" border="0"></a> Track Page Views With Auctiva's FREE Counter