GroStar GS1 pH Pen nutrient-combo Hydrofarm's Dirt Pot Box offers

Hydrofarm's Dirt Pot Box offers value and versatility

Replaceable pH Electrode

solvent-less press designed and developed specifically for the consumer

If you've been impressed by the immediate and powerful effect of G10 on the size and density of your flowers

creating a safe and super-fertile substrate

GroStar GS1 pH Pen nutrient-combo Hydrofarm's Dirt Pot Box offersIncludes: 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