some yellowing leaves on my small plants

hey I can use some help, i transplanted my seedlings into solo cups and 2 into larger pots , 2 of my small plants developed yellowing leaves at the edges and one plant had distorted leaf edges, i think that plant may have damaged roots,but the other one was a good looking seedling until now, however maybe half my plants seem to have stunted growth, i have then all growing under a blue mh and 2- 54 watt t5s, I've given them some general plant food and water every 2 days ck the soil for moist soil and ph is 7.can I get some help? thanks

Sounds like you burned them with nutrients. The distorted leaf edges could be a few different things. Can you post a pic? You generally dont feed seedlings until they get about 3-5 nodes and have a strong root base established. How old are they?