I can't afford two lights and since my main crop will be SOG having being able to effectively flower with the light is more important to me.
I went to the hardware chain that's in my region all they had was MG potting soil too. Sad. The only ferts they had was MG as well. They had seedling mix though, I was thinking of making a little hole and putting the seedling mix in the bucket with the seed. I hear MG can burn young plants easily so this may be a good idea?