GroStar GS1 pH Pen double-ended Xtra versatile—works with most fixtures

Xtra versatile—works with most fixtures

Push the probe directly into the soil

Mercenary is an all-natural insecticide derived from essential oils that prevents and controls eggs

GREAT for flushing

Digital ballast features low frequency

GroStar GS1 pH Pen double-ended Xtra versatile—works with most fixturesIncludes: pH 7 & pH4 calibration solution (50ml bottle each), KCL storage solution (10ml bottle), lanyard and user manual Measures pH and temperature Premium probe technologies and materials ensure high accuracy and durability with minimal maintenance Easy to use design and fast calibration adjustment Double junction replaceable probe, so you dont have to discard the entire pen when the probe reaches its end of life Large 3 color backlit screen gives