my buds seem small. I am in week 5 of flowering, 2 plants in my closet i have 4 cfl green screw in lights at 6200 lumins , nuts super bloom 12,55,6. ph about 6,5 , soil miracle grow pot mix, strain is Tahoe og kush seeds from the cali connection getting yellow spots i might need to ad cal mag i don't know?....any tips