Apera Instruments GroStar GS4-E Replacement pH/EC Combo Electrode Aeroponic Systems Threaded into an existing PE

Threaded into an existing PE micro-tube as a replacement sprinkler

Improves Winter Hardiness

Focus-designed for specialty flowering plants: Bio-engineered to replicate an ahrness the full brilliance of the sun

more is not always better

Apera Instruments GroStar GS4-E Replacement pH/EC Combo Electrode Aeroponic Systems Threaded into an existing PEGroStar GS4 E replacement pH EC combo electrode Measures pH, conductivity (EC and PPM) and temperature Combo probe built with lithium glass membrane and titanium alloy to ensure high accuracy and durability Premium probe technologies and materials ensure high accuracy and durability with minimal maintenance Double junction structure uses blue gel electrolyte without the air bubble 1 year warranty