You do have a water tank installed at your home don't you?  Well if you don't, get one, then get this nifty little wireless remote water level monitor from Rain Harvest.

The water sensor sits a-top your tank and uses ultrasonic radio waves, kind if like a fish finder I guess, to see how much water's in your tank.  It transmits a signal back to the receiver plugged in to a power-point in the home to give you a water level reading.

NewWater offer a great range of Rain Water tanks and an Aqua Reviva greywater systems. Their range of tanks include:

• slimline tanks
• in-slab tanks
• under-house tanks

Check out their website for more.

SaveMyGarden have a great range of rainwater tanks of all shapes and sizes for sale in every state. Prices range from $690 for the 775 litre T170 tank up to $1990 for the 10,000 litre TT2300.

Check out the SaveMyGarden Water Tanks page for details.