Strawberry Kush - DWC

I drenched the rockwool cubes in PH 6 RO water with EC 0.6 (0.4 calmag / 0.2 high N nutes) All seeds germinated on day 5 after planting, rockwool cubes were at constant 23°C, RH >90% After i see roots on the bottom i'll transplant them into the x-stream Does anyone have experience in planting them directly into the xstream? I wonder if the rockwool would be too wet and they would suffocate