Quote Originally Posted by PlantHeadJ
So everything is up and going the advanced is working ok with a mild cal mag def. I am only using the sensi A + B bloom with plans to use big bud and overdrive. I am just battling getting my ppm's right. Looking a little lime green from ph but working that out. I'll let ya'll know.
You need to get a pH pen. The liquid indicator is alright but especially when you factor in the color of the nutrient solution, they aren't as accurate as you might want. Shoot for a pH of 5.5-6.