Hello everybody. The soil of every plant I've potted in the past while with the soil from a new bag of Schultz potting soil has had mould (I'm assuming that's what it is) grow in it. It hasn't seemed to affect the plants at all. Is it the fertilizer? I don't think I'm overwatering, as I haven't had this problem with any other plant. Any idea as to what's happening? The last picture is bad, but I included it to show the mould (blurry white spots) appearing on the top of the soil.