I have food grade D.E. and all purpose sand... what type of soil can i use. I have a bag of miracle gro potting soil i was just going to add in but it has the little white pieces in it so i wasnt sure if it is safe... I also wanted to make a small one up of just soil for the brooder babies but i dont know what type of soil to add to theirs either. Help i dont want to harm my babes just trying to make them happier and healthier!