whats the main difference in these? what do you guys recommend? my seeds germinated today so tomorrow im going to the hydroponic store and they carry all four of them. what should i use? whats the easiest? this is my first grow. ive read that you should mix FFOF with LIght warrior. ive also heard to mix FFOF with Happy frog? again its my first grow...i wanna get the easiest soil to grow with. thanks guys.