Apera GroStar GS1-E Replacement pH Electrode CES3801 These super-sized black saucers are

These super-sized black saucers are made from durable

Industrial and Heavy-Industrial RO systems to help inhibit the formation of Calcium Carbonate scale build-up

and gibberllins

conductivity and temperature levels in reservoirs

Commercial growers find better results

Apera GroStar GS1-E Replacement pH Electrode CES3801 These super-sized black saucers areAI58010 GroStar GS1 E replacement pH electrode Replacement GS1 probe measures pH and temperature Premium probe technologies and materials ensure high accuracy and durability with minimal maintenance Low resistance lithium glass membrane double junction structure uses blue gel electrolyte without the air bubble 1 year warranty