Feb 24, 2005 #1 ziner Agricultural Feb 24, 2005 4 0 0 HR I am building a hydroponic system with Hanna HI 9913 pH, Ec controller. Where can I find some sheme or drawing to see did I put it together corectly.
I am building a hydroponic system with Hanna HI 9913 pH, Ec controller. Where can I find some sheme or drawing to see did I put it together corectly.