Feedback/HELP

I'm growing in DWC with tap water that's been aerated (sp?)

600w MH
pH: 5.6
ppm: 370
water temp: unknown but in an insulated cooler
nutes: dyna grow, pro-tek, & cal-mag


The taller plant strain is blue og. It seems to be stunted. It's almost Week 8 in veg and is at most 7 inches tall. HELP!

The other is lemon auto, root development is slow.
 

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Hi guys, just an update. My plants appear to be doing much better. It is grown over an inch and a half over the past 3-4 days. I added Dyna Grow, pro-tek, cal mag nuts nutrients to 770ppm and pH is 5.6. I also started pouring bloom into the nute concoction to transition the plant. Soon as my hps lights come in, I will switch to 12/12.
 
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