Powkoo Ultra-Thin Round Aquarium Filter Sponge Filter Water Filter -YX-002-

Key features: Sponge filters provide both mechanical and biological filtration?Fits fish tank size: 3 to 10 gallon? Innovative ultra-thin design, save space inside the aquarium tank, it looks more beautiful. Comes with filter sponge, bio balls, air stone inside, more surface area for beneficial bacterial to colonize and faster cycling, keep your fish tank crystal clear and clean All parts of the sponge filter are detachable so as to clean Easy to clean: simply squeeze the sponges in tank water. How to set up 1. This product needs to be connected to the air pump, and equipped with a check valve on the airline tube to prevent water return to the air pump due to power failure. PLEASE NOTE: air pump, airline tube and check valve not included. 2. Please choose suitable air flow. Kind reminder: Squeeze the sponge filter in tank water for 5 mins for 1st using, easy to digest form colonies of bacteria. Use aquarium tank water while washing sponge, do not rinse the sponge with tap water or hot water What you get 1 x Powkoo Ultra-thin Aquarium Sponge Filter 1 x Powkoo Retail Package Bag