ps.. I use MG and my plants are fucking awesome, but here is the trick.... see you and I grow similar so I may be able to help you a bit. MG has a low PH in the soil. So what I do is set the PH of my water to 7.8 your problem right now is you are over watering, which means you are over feeding. and yet at the same time if the PH is Incorrect, than your plant is not getting what it needs.
I set the PH to 7.8 I have the plant on 2700k for 16days. they I switch to 12/12. once the plant starts flowering. (about 14days after I switch lights to 12/12) then I readjust the Ph in the water to 6.8
in 68 days . about 10 weeks. I grow up to 1ounce of bud off my one plant.