Risantec Digital PH Meter Tester Best For Water Aquarium Pool Hot Tub Hydroponics Wine - Push Button Calibration Resolution .01 / High Accuracy +/- .05 - Large LCD Display Fast and accurate results. No guess work as with those annoying color charts and test strips. Use only one hand to get results in a snap. Auto calibration with included buffer powders. Great for kids school science experiments. Test different bottled waters or even your homemade sauerkraut. Super convenient for monitoring pool and spa or aquarium. Turn it on insert in liquid, read display Buy today and rest easy with our 100% satisfaction guarantee and our world class customer service.