Hi. I really need help with this issue. I have 17 mixed plants. Half of them are Lowryders. I am 16 days into the grow and half of the plants are experiencing problems with yellow sagging leaves. This started after I used miracle grow on day 9. I know it was early and before day 9 I have been over-watering them. Since day 9 though I have let the soil dry up and have not added any nutrients since. But now half of the plants have sagging leaves, even though I watered them yesterday and the bottom leaves are mostly yellow. I have checked the PH level. It is 7. They are under 24hr 600W Growlux lamp. The plants with the sagging are mostly tall but skinny. Some leaves have yellow dots others have turned light brown and are falling off. Please help. Thanks in advance.