The Save A Drop⢠Green Nozzle can be easily added to your hose to monitor water usage for required needs. Over-watering plants and schrubs can diminish plant health. Measure with this meter and you can take all the guesswork out of delivering the right amount of water to all of your plantings. Now you know exactly how much water each plant gets and you can prevent root rot and other infestations before they take hold in your garden. This is ideal for watering your expensive koi pond. Know exactly how much water you are adding with your chemcials and keep your fish healthy and your pond clear. Itâ¬"s perfect for your home, garden and greenhouse watering needs. The Save A Drop⢠Green Nozzle garden sprayer helps you conserve water by showing you how much youâ¬"re using. Knowing the consumption of your plants, ponds and car wash needs might just be enough to convince you to save water throughout your house