Keep the air stones on at all times.
When we start we go 15 minutes on time every 2 hours just for the first few days. Then we back it off to every 4 hours for a week then every 6 hours for the rest of the time.

We are also trying DWC and use the pump only the first week just to get the roots going to the water.

When your roots reach water you can remove pump. In the long run it's better. I think the roots grow better and happier. If you water all the time like we did in the beginning the roots do not develop good because they are soaked by the drip line and if you have a pump problem there are not many roots to hang in the water and dry out fast.

I would say watch the drip lines as roots will clog them up but since you will remove them soon I don't see a problem.

That unit from stealth uses rockwool cubes that are wrapped in plastic and when the drip line is in there all the time the plastic keeps the roots from going side ways to the water line.