defensible

Waterproof

M10442 is a lab grade 1500 ppm TDS solution standard prepared against a NIST traceable potassium chloride solution that allows you to recalibrate your meter or tester

Discard used solution after calibration—never reuse

hydroponics operation

NuvoH2O Home Duo Salt-Free Water Softener + Carbon Taste Filter — 2-in-1 Whole House System HM Digital PH-200 defensibleNuvoH2O Home Duo Salt Free Water Softener + Carbon Taste Filter System The NuvoH2O Home Duo is a 2 in 1 whole house water softener and taste filter system that delivers soft, clean, great tasting water from every tap. Using NuvoH2O's citrus based CitraCharge technology, it prevents and removes hard water scale while a 10 micron carbon filter eliminates chlorine, VOCs, sediment, and inorganic chemicals giving you bottled water quality straight from the