For one thing.....Go grab that MG fert, and then go stand by a trashcan......THEN THROW THAT STUFF AWAY!!!! Like the above poster said MG is not for...
No if you give them plain water that wouldnt be too much for them to handle apparently whatever you're doing right now is too much for them to handle...
Do you have any successful grows under your belt? If not I would not suggest any of those strains because they can be a bit finicky for a noob....if...