Hey,

My first question is how big is your res? Do you need the 2 air stones?

Also, are the roots out of the net pot and into the res?

If yes , then whats you EC? How mature is the plant? Maybe Its just hungry.

How is the yellowing? Is it from tip to petiole? Or the reverse?

Sorry for all the questions.

Whats in the net pots with the rooter? Claypebbles, perlite? Or is it covered and the root cube is in the res chamber so to speak...?

Squeeze the top of the root cube, if it oozes then maybe to wet. But if the roots are out of the cube and into the res i dont see how..

With out knowing more, i would guess its the whole plant thats yellowing so I will say hungry.

Best o luck

Thank you for your detailed response. The environment is right on the money. 75 deg air, 65 deg water nutrients are good. I now think what is happening is transplant shock. I start the seedlings in one spot and the grow room is in another. Different temps and lighting.

I am restarting to see if I am correct.

BTW the leaves are yellowing from the stem to the middle of the leaf and new leaves are affected as well.

The same thing happened with my first starts but they bounced back and grew well.

That's why I'm thinking it is transplant shock.

What is your thought on that?

Jeff

Ah, the dredded transplant shock.

I think yOu could be right. To a degree. Transplant shock shouldnt really yellow the leaves like you say. Which would make me lean toward it being hungry. It would maybe just slow it down.

If the yellowing started on older leaves then progressed to the younger growth, then it would most likely be a Nitrogen deficiency. N is moblie, moving to new growth when needed. Its Not all always the case, could be somthing else, but could likely be regarding the age...

But if you have just changed where the plant was, or its envrioment,say from a cfl or T5 light on to MH or HPS system, it could be Leaf bleaching.(a form of transplant shock)

A change of envrioment will stress the plant, yes, but it would just slow down growth till the plant ajusted to the new enviroment. Espically if the new envrioment is a better more productive one. It wouldnt do to much damage in the long run, just give like a day or two of no growth.

But if the new envrioment was worse than before it would be adjusting or dieing in a way...

I have tried different 'tonics' for transplant shock and some do as they say and provide the plant a leaf feed,really thats all they do,and some do actually speed up growth straight after transplant. Some have B vits and seaweed extracts. Say im transplanting,into a system from rockwool or rootriot cubes into a large system. Normally expanded clay or coco slabs....(infact, seaweed is very good for transplant shock, and cheap for a bottle in garden centers.)

starting to ramble ,,so i get back to your point.

Maybe if the enviroment is very different , try 'harding off',,I do that with seed started indoors which eventually go outside. Same princple, just goes in grow show from whereever,,,which may not be easy with DWC, and may need to be done before the actual transplant.

Sorry if im not much help.

Best o luck...