The Blue-Iris Soil Moisture indicating Garden Light (SMIGL) will ndicate to you the soil moisture level. There is three SMIGL controls 3 independent water feed lines, each one SMIGL with 3, levels of each soil moisture can auto-watering 3 diff erent species plants according to diff erent required soil moisture with this one. Gamma Pump and Water Container when you are away from your home for long periods of time (ie when on holiday ) or you forgot to water your plants.