Transplanted Clones are wilting in Hydroton.

Hi lads,
I am on my second grow, the first was a soil auto lowryder.

5 Days ago I transplanted some rockwool rooted cuttings from a standard propagator into an atami wilma system with hydroton. Some are looking OK, but most are wilting or curling a bit.

I have a 400w HPS over 3 feet above the plants, fan blowing across, hydro solution is 400PPM and PH +/- 6.0.
Ambient room temp is 20.C at most.

Watering schedule is 5 minutes every 4 hours using the blue flood drippers.

I am thinking either too wet, too dry or just plain transplanting shock? Will time cheer up these little 'uns?

Some pics below. Any suggestions welcome. The strain is Sannies 'madonna' btw.

did u ph your rockwool first that could be a problem all will be well though

No,
I forgot to PH those cubes before I stuck in the cuttings. They still rooted fine, albeit a little slowly. The wilting only happened since they were transferred to the hydroton.

I'll give them another few days and see what happens.

as long as they are rooted and getting water they should bounce back