<b> NO.17 internal filter for underwater aquariums </b> <br> <br> The fountain pump has filter nets that can be used to effectively filter large blocks while pumping to prevent the water pump from clogging. This effectively improves the circulation system to maintain a clean water environment. <br> <br> <b> High quality materials, suitable for fresh water or sea water </b> <br> <br> The pump housing is made of high quality ABS plastic and resin and the impeller shaft is made of ceramic, which is corrosion, acid and is alkali-resistant. The protection function of waterproof is IP68. <br> <br> <b> Easy to assemble and clean </b> <br> <br> The water pump for the aquarium can be easily assembled without tools. The removable pump head with filter is easy to clean and prevents contaminants from entering the pump. <br> <br> <b> Very quiet and compact design </b> <br> <br> Developed with a high-quality motor for a quiet working environment. The compact size is also easy to hide and carry. <br> <br> <b> Wide range of applications </b> <br> <br> It can be used in aquariums, ecological pools, breeding ponds, landscape tubes, gardens, rock garden fountains, hydroponics, etc. <br> <br> <b> Note: </b> <br> <br> 1. Please avoid that the pump runs in the air. <br> <br> 2. Disconnect the power supply when changing water. <br> <br> 3. Please clean it regularly about every two months.