plant leaves going brown/yellow and drying

Hi lads I'm wondering if anyone can help. My plants seem to have leaves turning brown. I'm guessing I had the nut EC too high.
Checked the EC and it was up as far as 1.6. I now have it down to 0.8 as I heard WW doesn't like strong nuts.

The brown/yellow parts on the leaves are almost metallic coppery looking.

Currently flooding 3 times a day.
Ph 5.8
EC moved from 1.6 to 0.8.
72 degrees temp
18/6 blue 150watt Envirolite
Ionic grow nuts
Rock wool with clay pellets.
Today moves to 5lt pots from the 2 lt shown in the pics.

Please help

You didn't say how old the girls are. I looks like maybe the solution is a little strong. They look old enough to start nutes but be very careful going overboard to soon. I always start out very weak and slowly and gradually move up. It isn't time to panic just go back a little bit. Good luck my friend!

WWgrower said:

You didn't say how old the girls are. I looks like maybe the solution is a little strong. They look old enough to start nutes but be very careful going overboard to soon. I always start out very weak and slowly and gradually move up. It isn't time to panic just go back a little bit. Good luck my friend!

Click to expand...

oh yeah they are 15 days old at those pics. 16 today. They are looking a little worse today. So I lowered the EC to 0.6.
I also did a bit of adjusting on my flood tray. I'm not sure it was flooding high enough. So now with the 5 lt pots I have it flooding to just about where the roots reach. Hopefully they will pick up.
I was planning on early flowering these plants, scrog or sog maybe. But I might just let them veg a week or two more first so they get a little stronger.

thanks for the help.