The new JBL internal filter CristalProfi i100 greenline is a modern, effieciency and comfortably internal aquarium filter with a lot of new features:Unobstrusive: With ist elegantly designed corner shape, the JBL CristalProfi i100 greenline internal filter fit unobstrusively in any aquarium. The filter is almost silent when running.Safe: The filter cartridges fit perfectly into the casing and have an extremely large surface, ensuring a high filter volume and reliable water cleansing. The JBL CristalProfi i100 greenline is TV/GS tested, completely submersible IPX8Easy to use: Novel extra large suction holders with a novel mechanism for removal. An innovative valve system, patent applied, empties the filter when it is removed from the aquarium, without the dirty water flowing back into the aquarium. Thanks to the modular construction, small appliances can -grow- when a larger aquarium is purchased. A wide range of filter materials suitable for use with the JBL CristalProfi i100 greenlin