plant problems using DWC and humboldt nutes

[ssc0530]

Hey guys, I'm not getting much traffic in my gj thread (sig link) so I need advice. I'll post my pics of my problem.



What do you think? nute burn? heat stress is ruled out. I have them (5000k CFLs) hung at 13in above plant tops.
I added nutrients almost a week ago and had to change it out the res the next day because I added too much, 1.45 oz. after cleaning it out I put in .45 oz nutrients in my 11 gal of filtered tap water. pH stays between 5.8 and 6.4. I had also flushed the pots... maybe they are still absorbing a lot from the first nute overdose? I am using humboldt mater A (4-0-6). maybe phosphate def?

any suggestions guys???

 

[nick17gar]

whats that white stuff in pic 3? seems to be on the leaf to the left

otherwise it looks ok. overnuting and under feeding happens, if its not too extreme, its best to just let it work its way out of the system, and not completly change everything. otherwise, they look healthy. id up the nitrogen just a tad to get a slightly darker leaf, and more growth, but overall id be confident that they will be ok

 

[ssc0530]

whats that white stuff in pic 3? seems to be on the leaf to the left

otherwise it looks ok. overnuting and under feeding happens, if its not too extreme, its best to just let it work its way out of the system, and not completly change everything. otherwise, they look healthy. id up the nitrogen just a tad to get a slightly darker leaf, and more growth, but overall id be confident that they will be ok

just glare from water after misting. any suggestions on adding nitrogen independently at a good rate?

 

[ssc0530]

bump.

i think they are getting back to normal. the plant is a lot greener and i cropped a few of the worse leaves on the bottom since i saw they were spreading. my main priority has been to keep up with the pH. using vinegar only allows me to get half a day it seems before going back to 7.0