1, a filter can only be marked above the nameplate rated voltage / frequency of use. 2, from time to time to deal with maintenance filter. Before cleaning and maintenance, be sure to disconnect the power supply filter. 3. Make sure that the electrical plug is not wet cleaning otherwise before re-power plug must be dry. 4, can not unplug the power cord with wet hands. 5, the filter is limited to indoor aquarium use. 6, if the filter is damaged, in particular, can not be used when the power cord is damaged. 7. Make sure the filter is working in the correct level, the filter can not be used in the absence of water. 8. Do not disassemble or repair without permission filter, in order to avoid the risk of damage to the body or filter maintenance performed by professionals.