Hi as i am a beginner everything is new i have noticed some yellow on some of the leaves the back ground is :
Week 3 of veg
In bat gwano soil as mentioned above
Watered every 3 days
Temps 26 or 78f
Waters ph is 7.0
Light 20-4 400w MH
I have nothing added but what is in the soil
Thanks for the reply's! I have lowered the ph of the water to 6.2 and added a iron booster after taking another look at the ph it was 7.3 so that may of been the issue, For a easy life i am using bottled water for now as i dont trust the tap water