Those are waaaay too young for nutrients. Flush with properly ph'd water, and/or start thinking about transplanting into one gallon pots.

Your ph is too high. Between 6.3 and 6.8 ph is 'normal' for peat-based soil grows.

Do not attempt corrective measures unless you know what you are correcting, and why. It's best to ask here before you kill the plants with best intentions and false assumptions.

You might want to read through some of the grow logs and see how other's are raising their young. Then the FAQ section, then the basic growing threads, and perhaps the plant problems section...:thumbsup: