Nutrient Schedules for the Under Current System

[MurderVille]

I water change every week. Got ph flux, yellowing. I'm using the current culture line. No additives. RO water calimag in veg calimag in flower. What am I doing wrong. Help!!!

Are you using UC Roots? If not get some or make your own using bleach or pool shock. If this does not clear things up then you may also have a fungus gnat problem.