Answer: The potting soil either was not sterile or contamination occurred after you opened the bag. Your seedlings were attacked by the fungus that causes "damping off". One sure sign is the fact that the seedlings came up and then toppled over. If you look closely at the stem at the soil line, you will see that the stem has become brown and withered...a sure sign of damping off! If you wish to sterilize your soil, bake it at 275 degrees F. for at least 30 minutes. The white you see on the soil surface is a fungus but what fungus I am not sure. Once the seeds have germinated, I suggest that you water from above and water until the pot feels heavy. That way you can be sure that all seedlings have received water. If chamomile tea works and the seedlings aren't affected then, then continue the treatment. I could not comment on the chamomile tea treatment since I've never tried it. Your house temperature is fine for starting seeds and growing seedlings.
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