need help wth yellow leaves

I have yellow leaves with brown around the edges and the veins are a light green.

My friend said they have lack of nitro but im not sure. Please help

I have a flood and drain with a 25 res. I flood every 8 hrs.
Nutrients are general hydro hard floramicro, florabloom and volcano guano.
Im using the lucas method along with cocoperl with smart pots.
i have had the clones for a week and they are about 7 inches tall.
Temp is around 70 and humidity is around 50
i have a 400w light about 9 inches away
My res is 6.2 ph nd 470 ppm
Soil is at 7ph and 170 ppm

I am not familiar with using coco and flood n drain, but they look over done.
They are way too young to get such high amounts of food.
I would think to try and flood them less often than 8 hours... maybe 12? They look too wet.
Good luck,
Trich

the soil is damp. so maybe they could be over feed. the last water was at 3am

Can ppl pls leave feedback. I need something to work with on opinions

Im having the same problems

Scorchie said:

Im having the same problems

Click to expand...

yeah i got the same problem too and have had it for a year im starting to solve my problems now i use a ph of 5.5 and clone in rockwool presoaked for a day in the 5.5 ph water with some DNF Green it improves the sucess rates of ur cuttings and helps build strong rooting systems. i have 5 clones rooting right now about on day 6 il let u know if they work for me man

Ya let me. I think it's from too much nutrients. But u nvr know.

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From the looks of your pictures, I think you are OK. I'm on my first clone attempt, and it seems the new leaves get green, but the older "cloned" leaves are dying off. Keep a close eye on them in case the new growth gets the same issues

Good luck with your grow!.