Waterproof Digital Refractometer - Brix 0 to 88% Sea Green Hydro Helpful Growing Gadgets: A timer

Helpful Growing Gadgets: A timer automatically switches the LED grow lights on and off at set times

a 4'' Inline Fan & 4'' Carbon Filter Combo

on golf courses

Glassy Winged Sharpshooters

Waterproof Digital Refractometer - Brix 0 to 88% Sea Green Hydro Helpful Growing Gadgets: A timerThis refractometer is housed in a protective, rubberized IP65 waterproof case to safeguard from wet environments, and makes for easy cleanups. Measure samples as small as 1 ml, in the field with laboratory accuracy. Sample temperature is initially displayed on the large LCD followed by the measurement results. The sophisticated microprocessor provides automatic calibration, automatic temperature compensation and automatic shutoff (after 3 minutes).