Description: 100% Brand New and Quality 1. The use of environmentally friendly high-level sponge as a filter, the use of the air pump (to be purchased separately) outlet access to the goods can be air intakes. 2. To ensure efficient nitrifying bacteria culture, to achieve clean and good water quality stability, effective oxygen and water quality filtration. 3. Ultra-fine filter holes can effectively filter harmful bacteria and suspended solids, keep the water clean and thorough. 4. Increase oxygen, fully dissolved oxygen pump into the fish tank to improve fish survival. 5. Biochemical cotton filter to air pump as the power source, improve water dissolved oxygen and bacteria, combined with mechanical filtration, biological filtration principle and the use of multi-level filtration culture of high-density nitrifying bacteria group, to clean and good water quality stability, suitable for all kinds of Ornamental fish breeding, breeding, young fish to develop, especially for the Discus fish, small fish, fry effect is remarkable. Specifics: Material: Foam+Plastic Color: Black Quantity: 1 PC Size: XY-180: (add plastic tube) height: 16cm, diameter: 8cm; sponge height: 6.3cm, sponge diameter: 8cm XY-280: (add plastic tube) height: 16.5cm, diameter: 12cm; sponge height: 6.5cm, sponge diameter: 12cm XY-380: (add plastic tube) height: 21cm, diameter: 12cm; sponge height: 11.5cm, sponge diameter: 12cm Water Type: All Water Types QA (1)Question: Have just received my Sponge filter but dont have a clue how to use it, there is a plastic thing that doesnt fit anywhere, help Answer: The clear plastic tube on top comes off, thread a airline through it and push on to the plastic holder inside, after this put the plastic tube back on, switch the air pump on and the bubble will come out the top of the tube, this pulls the water through the sponge and becomes the filter, (2)Question: where do i connect the air pipe Answer: Its at the base of the sponge pipe, if you remove the pipe on the top of the sponge filter theres a nipple in the middle of the sponge. Dont forget to thread the air pipe through the sponge pipe before you connect to the nipple. Note: 1. You need to buy extra more 1unit Air Pump to drive the air filter Please dont buy if you dont have Air Pump 2. Please allow 1-2cm error due to manual measurement. 3. Color may have a little color difference, Because of the different display settings. This Listing includes : 1 x Sponge filter