Lower your EC to 0.4-0.6 EC max for seedlings. Use the TA TriPart “Expert” hydro schedule:
• TriPart Grow: 0.5 ml/L
• TriPart Micro: 0.5 ml/L
• TriPart Bloom: 0.5 ml/L
• Target EC: 0.3-0.6
Don’t mind buddy below, he’s quick to point out others but never helps with solutions. Anytime you need help, feel free to shoot me a message!