Nute burn when switching to flower, DWC

[GoogleGenie]

Sorry @damname I've just seen this. Just catching up

 

[GoogleGenie]

tds/ec meter give false readings. might be something to do with it.

How do you mean? Was it telling you it was stronger than it was, or the other way around?

They are still not feeding. PH still falling. In 24 hours both res have stayed at about 350ppm. Leaves are starting to get crispy again. I found alot of dried bits and pieces on the floor again.

Is the water level dropping? Can you show a picture of the damage?

I have already changed the water twice. Both times i gave them straight ph balanced distilled water for 24 hours. I have followed the nutes instructions on the bottle and diluted it down to 500ppm. Ended up diluting it down in the res to 350ishppm to try and see if going lite on the nutes would help.....

I am at a loss here.

It is strange. Once you share some pics it might help diagnose the issue. If you can, try to get a pic of a leaf in the early phases of the issue, and one at its most severe, just so we can see the progression of it.