yeah i am in fact using the Miracle grow seedling soil. I dont think the levels of ferts in there are high enough to really harm the seedling but what do i know im a total nooblet!

The only real reason i say this though is because the other seedling seems to be doing absolutely fine in it. I think its more because i used the bottome of a powerade bottle as a pot for the seedling and that could be why i think?!

Anyway though here's a pic of the nute content of the miracle grow seedling starter soil.