First time Hydro leave problems

I am using a DWC hydro system
Clay pellets for the medium
Using Sensi Grow part A and B nutes along with B-52
All my res water is RO
So here's my problem I have brown spots on my leaves and they are twisting and flaking off. This is my first Time using hydro And I expected some problems but I am not reAlly sure how to proceed here. They are on day 20 in the buckets now and I just changed my res two days ago. I bumped up the nutes a notch on this res change.
I used RO water and added 1/4 cup of both Sensi A and B and 1/8 cup B-52 for a 4 gal res. went by the instructions on the bottle for plants at my stage. This brought the ppm to ~ 800.
After seeing the leaves I checked the ph and it's sitting right at 6.0
Odd thing is I have another plant right next to her with the same setup and she hasn't show any symptoms.
I am going to flush and use a lower dose of nutes and see what happens.
It almost looks like a phosphorous lockout/ def but I can't be sure.
Has anybody had any similar experiences or problems and have some insight?
Any questions or suggestion would be greatly appreciated.

It does look like you have too much of something. Phosphorous seems accurate but it is probably a combination. I am not familiar with these nutrients but in this case I would definitely flush the reservoir and use only 500ppm at 5.6 to 5.8 pH. Can you take a picture from a little further back? Maybe a pic of the comparison between the two?

what the root look like... b-52. It contains special organic compounds that facilitate uptake of vitamins, minerals and other ingredients while raising cellular-level metabolism. B-52

I'm thinking he's not checking the reservoir enough. ....plant sucks up water... pH gets messed up.... nutrient lock out... first timer mistake

" I just changed my res two days ago"
about rite for root rot to set in " special organic " don't go well in DWC

Terry385 said:

" I just changed my res two days ago"
about rite for root rot to set in " special organic " don't go well in DWC

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Looks pretty onset for leaf damage in 2 days.. I'm guessing an ongoing problem.

Dumme said:

Looks pretty onset for leaf damage in 2 days.. I'm guessing an ongoing problem.

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i was amazed at what can happen over night with DWC live and learned the hard way

i don't chase after ppm or ph any more plants look better too
http://www.skunklabshc.com/shop.html

I change my res every 7 days. These problems happened over two days. The roots look all white and they smell fine earthy and no must. The b52 is the problem? Ill try not adding it and bring the ppm down to 500. The other plant is about 3 days behind in growth so maybe it hasnt hit her yet. What nutes do you recommend for dwc?

NORML said:

I change my res every 7 days. These problems happened over two days. The roots look all white and they smell fine earthy and no must. The b52 is the problem? Ill try not adding it and bring the ppm down to 500. The other plant is about 3 days behind in growth so maybe it hasnt hit her yet. What nutes do you recommend for dwc?

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7days will be too long, too late, as she sucks up more and more water. The right mix of nutrients change as she gets bigger too. That's the problem with working with 5gal buckets.

I still say pH problem with nutrient lock out
Keep in mind, once the damage is done to the leaf, it's that way for its lifetime.

NORML said:

I change my res every 7 days. These problems happened over two days. The roots look all white and they smell fine earthy and no must. The b52 is the problem? Ill try not adding it and bring the ppm down to 500. The other plant is about 3 days behind in growth so maybe it hasnt hit her yet. What nutes do you recommend for dwc?

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Using Sensi Grow part A and B nutes ... is ok just stop that b-52 sure roots look ok not turning brown no where if your roots are good maybe OD on nutes
if they are turning brown
i use tea http://www.skunklabshc.com/shop.html

watch videos on their website how to brew tea complete

https://www.youtube.com/channel/UCqqxIclItlmFudDAsPzc4zg

https://www.youtube.com/channel/UCCJse5ewPAtDU5WUBG7NN3w HHT DWC videos Using Sensi Grow part A and B nutes tell you how much he's using each week
i watch lots of videos

you have to top off daily in late veg more res changes in flower my tree drinks a gal. a day in flower rite now
just seen you using white buckets light can get in you have to cover them or can you get black buckets.. you did not say air pump or air stones i like lots of air movement in each bucket

I use black buckets and i have 4 4inch airstones per bucket. What are some ways ican tell if root rot is starting?

Here's pics of the roots

the leaves.. and roots turn brown your nutes won't make root brown they well be pearly white

just seen pic's of roots as typing see the brown slimy stuff that well take over you need to start on tea
http://www.growweedeasy.com/root-rot

Also i change my res weekly and bleach everything . For now i brought the ppm down and addesome peroxide

I've used every thing don't work for long looks good one day then POW it's back
i used this and haven't looked back http://www.ebay.com/itm/191226121309?_trksid=p2060353.m1438.l2649&ssPageName=STRK:MEBIDX:IT have in 2 days 2 days to brew
i start it at first res change then add 1 oz. per gal. every 3 days all the way to week 7 of flower
still green 2 weeks of just water 9 week pic

Cal-Mag? Did you get to the bottom of this in the end?

RO water has no calcium and magnesium like tap water, you have to add it.