autoflowering, yellowing of plants

[greenelasticban]

well hope this is a good one got myself automatic flowering seeds, 15
easy Ryder and 15 low Ryder , all feminized. germinated them only 2
didn't sprout, most of them are looking healthy. that’s what I’m
posting about need some advice a couple of the easy ryders have kind of
small wrinkly leaves and the new leaves growing in are doing the same,
and another 1 is really bright yellow, crazily yellow!!!

I have two 1.5m nft hydro beds with 15 easy Ryder in 1 and 13 low Ryder
in the other, all the other plants are doing fine apart from 4 wrinkly
ones and 1 bright yellow 1.

They only 13 days old I have them on a quarter strength nutrient
solution of house and gardens A and B and root stimulator too, I’m
following the 10 week chart provided but at quarter strength to begin
with and going too miss out a couple of weeks to bring it down to 7
weeks with nutrients and then 2 weeks with water.

I’ve got them in a 2.4mL x 1.2mD x 2.0mH grow tent with 2 600w hps
lights in cool tubes with extractor fans running, my temperature and
humidity levels are fine, just cant figure out what’s wrong, going to
post pictures soon but can someone please help, this is only my third
grow and never really had any problems before

[TBuds]

Lets see all plants are under the same conditions and with the problem limited to 1 strain,i might have to say mutants,bad seed(there's one in every group) Would like to see your set tho