The Eheim aquaAlert+e continuously monitors the conductivity (S/cm) and temperature of your aquarium. It warns when limit values are exceeded and detects sudden jumps in conductivity (over 50% within one hour). It also automatically calculates the time until the next water change, based on the measurement history. Colour-coded warning levels (green, yellow and red) and notifications, including email reminders for cleaning the electrodes, help to maintain stable water quality at all times. The Eheim aquaAlert+e can be conveniently controlled via Wi-Fi (2.4 GHz) using a smartphone, tablet or PC/Mac. For freshwater only.Eheim aquaAlert+e+ warning system with integrated WiFi function and wireless control via smartphone, tablet, or PC/Mac+ precise measurements thanks to calibration+ individual warning with customizable threshold value+ alarm in case of sudden increase in conductivity (>50% within one hour)+ various warning levels with corresponding recommendations for action+ color-coded d