GroStar GS1 pH Pen double-ended Mercenary is an all-natural insecticide

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

Push the probe directly into the soil

This blend has been proven to be an optimal all in one base 'bloom' horticultural fertilizer

Aquaponics is a revolutionary combination of the best of aquaculture and hydroponics-a fun and easy way to raise fish together with organically grown plants

GroStar GS1 pH Pen double-ended Mercenary is an all-natural insecticideIncludes: 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