This is great tool for when you need to test your pond or aquarium PH. It’s a fast and accurate meter. What you save in buying drop type test kits will more than pay for this meter. And those kits are not usually very accurate. You will never have to guess which color the PH strips are closet to. It is fast and simple to use. Just dip it in the pond, aquarium or swimmng pool and read the reading on the digital display in just a few seconds. This unit comes in sturdy clear plastic case with calibration screwdriver and user’s guide.This Ph meter is ideal for most laboratory,ecological studies and other applications, for water and wastewater treatment, electroplating rinse tanks, drinking water, for hydroponics, aquaculture, aquariums and  fish farms and swimming pools