Quote Originally Posted by grey1223
While I haven't used MG I know it works as Rusty said plus I knew someone who used to use it. I remember one time I put 1" layer of perlite in bottom of pots and boy was that perlite full of roots and drained well.
I can never find a perlite that's thick enough to not constantly flow out of the holes when I Water the plants.

I'm thinking of using hydrotron at the bottom of my pots for my next grow.

Just another option for him to use aside from rocks and perlite.

edit: On another note I'm not sure hot hydrotron at the bottom of my pot will effect my runoff ph, might not be such a good idea after all.