diagnosis needed! save the clones!

My clones have something wrong with them, progression seems slow but the leaves are turning yellow and white,

I did make the mistake of using a small amount of Fox Farm big bloom with pH balanced water, a very small amount,

two of them are clearly dead which I don't care about I have 30 seedlings in the same tray and it will be a disaster if the problems consistant, and no this evening to only recieved pH water. they look good.

I look at the deficiency is it seems like it could be multiple ones.

I have most likely whatever I need on hand from lime to Fox farms and general hydroponics,I just need to figure it out first....

it started with a lower tips yelling and then turning brown slightly almost like nuts burn, spread throughout day, from old growth to new and is followed by crinkling brown leaves!?!

Here's some pics

Avenge my ladies!

You don't need to feed nutes until you get some strong roots . Your rockwool looks waterlogged . Just water once a day with PH'd water . Make sure to have good drainage . Rockwool need to drain and dry to draw in Oxygen .

Like he said. To much water in rockwools. To me?? But not sure. I use Rockwool too. I wait till they get light. Then water with mild nutes.

Overwatering and poor quality mother plant. You only need the cubes 50% wet at all times including the start. When you water only dip the corner of th cube into the water, dont saturate it and push out all the air.
Try to keep mums healthy,green and vigorous.
Also when you put the cutting into the rw cube make sure the rw is tightly around the stem ,no gaps between the rw and the stem cut.