Apera GroStar GS4-E Replacement pH/EC Combo Electrode HGC700634 With one nitrogen source designed

With one nitrogen source designed to provide a boost up-front and another formulated to break down slowly and feed over time

including spores

When cleaning the Quantanium tumbler

Because of the aerated fabric bag the growth rate and dry down is enhanced greatly

Gnatrol is OMRI-listed for organic production

Apera GroStar GS4-E Replacement pH/EC Combo Electrode HGC700634 With one nitrogen source designedAI58040 GroStar 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