Is this Nitro.def? These are 11 day old seedlings. I, noticed some yellowing first on the petioles....? Little round leaf, and some rust on Maggie, I cut it off. Today I see another one is getting it also. They have been sprouted in our own well water, I used a soil, containing spagnum peat moss vermiculite and seaweed. I started using Fulvic acid @ 42.5 PPM for feeding. thats about 0.22 grams in a gallon. I started flush with water. I flushed twice now in last 4 days. could it be the folic or a bug? I have some ant looking flies and even smaller brown bugs. Any ideas? Should I just keep a watch and give just reg. water?