I'm pretty sure my yellowing issue is linked to my watering method. I fill a 5 gallon bucket mixed with nutrients, and that lasts about 3-4 days. Over those days, I think the PH is drifting way too high and locking out nutrients. Halfway thru this week I checked the PH before I added more water and it was at 7.0. I was also diluting the nutrients by mixing (2) 1 gallon pitchers with nutrients and PH'd water then adding (2) more pitchers of water, assuming the PH was okay. Now I'll be PH the extra water and checking the 5gal bucket every few days to ensure we're in a good zone. The plants are already looking greener and happier now that I'm watering in the proper range and giving 3 pitchers of nutrient water and 1 pitcher of PH'd water. I also added an air stone to the 5gal bucket, that could be helping as well.
Hey! Happy growing my friend! I hope you do well and get some good results! I will come by sometime to see your progress!
If you ever visit my page please say hello!
Peace & love L.S.T