Deficiency Of Some Sort.

This plant has always been the runt of the lot, growth was slow from the start. It germinated a few days after the rest, and after sprouting its first sets of leaves (which were oddly deformed, for reasons unknown to me), small golden spots started appearing on the second set. and then on the set up from that I noticed the leaf seems to be decaying slightly... Not so sure why, I was hoping someone could help me out. Forgive me on the image quality, cell phone doesn't have the greatest lens.
Here's some additional info:
FoxFarm's Ocean Forest is the medium
A small dose of Gen. Hydro's Nova: Grow was applied almost a week ago, via reg. watering
And I've given them two applications of some mycorrhizae and other beneficial fungi by Roots Organic during transplanting
The lighting is a 4 ft 8 bulb with GE high output t-5's
Temp remains around 80F pretty consistently during the day. and 73F at night
RH ranges from 50%-70%

They may need some more Phosphorus. At that size, they should be getting full strength fertilizations. Be sure to check the soil pH as well.

That's what I was thinking, but I was only referring to Jorge Cervantes' grow bible and the drawings in there are not of the highest quality. Full strength nutes though? I was under the assumption that the golden brown spots in the third pic and the last pic, were burn spots from the nutes.

i personally would not give full strength nutes just yet as there would be enough in the soil i would have thought. but i dont have as much exp as mothers finest so probs best to forget everything i said!
lu

Those spots aren't from nutrient burn. Nutrient burn starts with the lowest and oldest leaves and works its way up. The pod leaves and first single-bladed leaves are the best indicators of most toxicities. While it's more commonly seen in larger patches, P def. often causes crispy, brown splotches in fairly random places on the leaves.