Need help with clones? Half dying

[Ironmike340]

I have clones og kush forever no problem.
I have acquired kandy kush and the plant is amazing in hydro. The problem in cloner og live and riot and haven’t had a kandy survive. They turn brown and wilt.
Ro water ph is 5.9
I added 6ml clonex per gallon
Also calmag 10ml per gallon.
Water temp kept under 72
Under t 4 bulbs but removed 2 thinking maybe to much light what can I do different also air stone installed and working well

 

[Curiousnoob]

Have you tried with just water? I have only ever used straight tap water not even PhD, after dipping them in clonex for five minutes. Although I do just stick them straight into coco coir.