An easy way to reduce water wastage is by installing a Water Smart Flow Meter from Gardena. This cool gadget measures water consumption and flow and can dispense water based on your plants' requirements, thus avoiding under or over watering. Consumed water quantities can be read on a large digital display with the battery-level also shown, and there is just one button for all the functions. The meter can easily be connected to the tap, sprinkler, pump and hose-on fertilisers. Available for $29.95 from Gardena.