Another thing is that i have used MG organic and ive had problems, such as Gnats, root rot, as well as nute defficiency.

If its the only soil you can get your hands on i would recommend keeping an eye on it everyday as Gnats come from the soil (you might be luck and not have some) As well as when you repot make sure to add pearlite, (i like 30-50 %)
And another this is try Googling Hydroponic stores around you, they have everything you need to make this grow successful.

:jointsmile: