These seedlings are about 3 weeks old and seemed to be doing quite well. I just noticed some green almost crusty spots on the back of true leaves, they almost look like blisters. The spots are on 3 of 20 seedlings, have no clue what it is. The seedlings are inside under grow lights. thanks in advance.
[img]https://imagehost.vendio.com/bin/imageserver.x/00000000/valuemet/leafspotnov293.jpg[/img]