To much nutes!!!
Only give ph water for next few waterings.
It is coco. Thank youIs that coco? If so cut the nutrient strength in half and keep going. They should grow out of it. Don't run plain pH'd water through coco. Always use a weak nutrient solution. It could be 1/8 - 1/4 strength.
Buy a bag of Black Gold Seedling Mix. You can find it everywhere. Germinate directly in it in Dixie cups. Then follow xtsho’s directions and suggestions.Thank you soooo much.