Day 18...

Alright, whats wrong with the plants? The 1st 2 pics are of the worst plant (not the runt though), its leaves are turning yellow around the edges, then moving towards the center, the bottom leaves did this first, then the next ones up.

There is also a pic of the runt, and also two plants have secondary growth over night since I put in the fresh air, dont have a pic yet, will get one once I get home...I'm just about to leave to get some fertilizer.

Anyone that can help, it would be great. Thanks.