Hi just started week 5. I watered and fed yesterday using my GH Nutes ( 1 tsp grow/ 2 tsp micro/ 3 tsp bloom) Ph 6.5 per gal. About the only difference I've made is upping the micro and bloom and today I noticed a lot of yellow leaves happening on lower plants? Am growing Barney's Liberty Haze. Maybe my feeding is off? Possibly need more N? Or a mag deficiency?