Aqua Medic Refill System 2.0 is a automatic top up unit with run-dry protection with optical and acoustic alarm for the automatic refilling of evaporated water in the aquarium. The system comes complete with refill pump, infraed sensors and hoses. Aqua Medic Refill System 2.0 is suitable for the use with a cabinet aquarium filter.Aqua Medic Refill System 2.0+ permanent monitoring of the water level in the aquarium by means of a trouble-free and maintenance-free Reed sensor with delay circuit (no disturbance due to surface movement)+ automatic refilling of evaporated aquarium water+ variable sensor holder allows adaptation to different water levels in the filter tank+ dry-running protection of the refilling pump - optical and acoustic alarm+ there is a warning for low water level of the refill tank+ easy installation and maintenance, plug connections on all cables (incl. cable protection against unintentional release)+ safety shutdown circuit in case of a defective level sensor+ 12 V lo