You just started feeding? Even when I used ffof I would water once with plain water then feed. Small plants that size would get at least 800 ppms of nutes every other watering! Then as they grow you increase 100 ppms every other feed too! You just have to use a ppm meter... It looks like you're using out door dirt that could have weeds, bugs whatever...
With the ingredients listed in the mix, I didn't think feeding would be an issue until way later...as my soil I usually don't feed for 4 weeks. But it is coco based...could that be an issue? My mix is 50/50 coco peat, oyster shell, alfalfa meal, bat guano, crab meal, ewc, bio dynamic compost, fish bone meal, kelp meal, azomite. The listed in the bus is Coir, compost (dairy cow manure, wood chips, straw, concentrations of yarrow, chamomile, valerian, stinging nettle, dandelion, & oak bark), fir bark, perlite, worm castings, soybean meal, fish meal, fish bone meal, langbeinite, alfalfa meal, crab meal, green sand, neem seed meal, volcanic ash, & kelp meal. States it has food for 6 weeks...
