Extracorporeal blood treatment apparatus with reservoir status lights and methods of monitoring reservoir status using the same are described. The extracorporeal blood treatment apparatus include a plurality of reservoir scales (30), each of which is configured to weigh a reservoir (32) used in connection with the extracorporeal blood treatment apparatus. A plurality of reservoir status lights (40) are provided, with one or more of the reservoir status lights (40) associated with one of the reservoir scales (30). The one or more reservoir status lights (40) associated with one of the reservoir scales (30) emit light from a location that is closer to their associated reservoir scale than to any other reservoir scale of the extracorporeal blood treatment apparatus.
