Leaf Problems

[Ranek Icewalker]

Hey all i got a new batch of clones last saturday and ive been having some problems with them sicnei got them, 3 of the original 6 have died without throwing roots outside the pot in DWC 5 gallon buckets, the remaining 3 look healthy all things considered except they are gettign these sickly leaves.

Im using RO Water, AN 3 part nutes, PPM is about 300ish, using a bit of cal-mag, have 1000w HPS well ventilated area, temps mid 70's with lights on, PH is always between 5.4-5.8 and has never been over that.

I really dunno what is wrong, i though it was a P deficiency but i dont think it is now, can anyone give me any info on whats wrong with my ladies?

Much appreciated

These pics are leaves from 3 different plants, they all seem to be having the same problem.

 

[ozzydiodude]

Are you hand water them til the roots develop into the water?

 

[Ranek Icewalker]

These plants all have good roots so they dont need any hand watering.
i kept them in the DWC with just like 1/4 inc of water in the bottom of the pots so they werent submerged but the water was lapping at the pots.

 

[Jericho]

Looks more like potassium (k) if its a deficiency IMO

 

[Ranek Icewalker]

Thanks for the replies guys, i figured out my problem after tons of research i discovered i had root aphids, they eat your roots and cause the leaf speckling, and kill your plants, i made a post a few days back about bugs but no one could help me, so i wasnt sure what i had, took a while but i figured it out, and i bought some Organicde from Home depot dunked em and i think it worked.