I have a 23 day old Purple Wreck growing from seed under a 250 watt hps, everything was going great it's starting show lil pistels and now has quite pungent smell and also has 5 sets of leaves but now I look the lower leaves are now going from dark green when they first come out then will turn to a light green then eventually to a pale yellow, I have in total 6 sets of leaves are the cotyledons but first 2 are starting to go yellow and set after that is looking like it will also go yellow..

It started of on the cotyledons which is now a pale yellow which I asumed was normal?

Now the set of leaves above the cotyledons which I think are the plants first true leaves are also pale yellow

The next 2 sets of leaves which are above that are either yellow or a limey/pale green looking like they are also going to go yellow not sure if this is normal or has a N deficiency?

I have been feeding them with very little amount of bat guano in water at veg.

I was also wondering if it is a N deficiency I have some Concentrated Tomato Plant food, which on the back say.

E.U NPK Fertiliser 4.5:3:9 plus trace elements

I was wondering would this be good enough for flowering? and if I may have a N deficiency would it help that aswell.

Please Help, the plant is very pungent at this stage which really suprised me for how young it was so would be real shame to loose it.