I use coconut coir to plant my seeds in . no muss no fuss nothing organic to mold or grow fungus in or whatever those slimy flowery shaped things were in your dirt ( some kind of mold I am assuming) . I get no fungus gnats (I used to lose a lot of plants to these little critters) or white fly or anything else . Plants grow spectacularly well in this stuff. It is nice and light ( friable) so roots dont have to strain to grow. I love the stuff. Only requirement is to keep it watered as you would any other seedling starter.