At 491 PPM? It's nute burn. A seedling in soil should not be given any kind of nutrient, only calmag if your water is too soft, but never beyond 200 to 250 PPMs
At 491 PPM? It's nute burn. A seedling in soil should not be given any kind of nutrient, only calmag if your water is too soft, but never beyond 200 to 250 PPMs