[. . . ] The use of attachments not recommended or sold by the appliance manufacturer may cause an unsafe condition. Do not install or store the appliance where it will be exposed to the weather or to temperatures below freezing. Make sure an appliance mounted on a tank is securely installed before operating it. If an extension cord is necessary, a cord with a proper rating should be used. [. . . ] It is imperative to disconnect the filter from the mains prior to opening it. This equipment is not intended for use by persons (including children) with limited physical, sensory or mental abilities or for persons with no experience or knowledge unless they are supervised by a person responsible for safety or unless they have received from such a person instructions on how to use the equipment. Children should be supervised to ensure that they do not play with the equipment. Please consult the manuals of medical equipment for the required safety margins. Attention: Maintenance work presents the risk of crushing th fingers due to high magnetic forces. For your own safety, we recommend to form a drip loop with the connection cable to prevent any water running along the cable from intruding into the socket. When using a multiple socket or an external power supply unit, position them atop the filter's power connection. Since a wide variety of varnishes and polishes are used when processing timer, the appliance feet can leave visible traces on furniture or parquet floors as a result of chemical reactions. Therefore the device should not be placed on unprotected wooden surfaces. To achieve optimal operational safety there must be a maximum of 180 cm between the surface of the water and the bottom of the filter. Be careful when touching the heating coil of devices with integrated heater. Disassemble the safety adapter (13) and the pump head (17) (chapter 3, step 1 - 3). Remove the pre-filter, the filter cartridge with the screened cover and white filter fleece. Rinse the filter inserts (7) and filter media with water until they are clean (see EASY CLEAN function). Note: Only carry out steps 7 to 8 during every third to fourth general cleaning. By mixing used and new substrate media, the required bacteria cultures remain intact. Caution: Do not overfill filter inserts as, otherwise, their accurate fit is no longer assured. Leave one-third of the used EHEIM SUBSTRAT pro and EHEIM bioMECH in the filter cartridge. Attach the pump head (17) (observe fitting position) and close the locking clips (9). Disassemble the safety adapter (13) and the pump head (17) (chapter 3, step 1 - 3). Clean the pump chamber, pump cover, pump wheel and lubrication duct with the EHEIM cleaning set (No. Close the pump chamber with the pump cover (22) observing the cutout and studs (arrows). [. . . ] This leads to a drastic reduction in pump performance within a short time. When cleaning, remove the filter media from the filter media basket and rinse through with lukewarm water. check that filter media have been assembled correctly in the recommended layers of filtering. Fill next filter inserts with EHEIM SUBSTRAT, also to just under edge. [. . . ]