I covered the basket with hydroton pebbles after this pic to prevent light leak into my reservoir. I also buried the rockwool to prevent algae growth. I rinse my clay pebbles with PH treated water to avoid reservoir contamination.
The major structural issues is primarily due to the cold temperature of the water in my reservoir. It was hitting -30c temps outside. It took me a minute for it to set in that my reservoir temperature was the culprit. I had a water temperature regulator ordered; in the meantime, she kind suffers slow growth and wilting.
DWC tip#2: If your water is cold, get a water warmer; Alternately, you will see if water is too hot, get a water chiller. Both extremes are really something you can’t ignore you should have a solution before germinating your seed.