Replanting of spinach

One week have passed since I replanted spinach seedlings into bigger mineral-wool cubes and placed them into growhouse under artificial light. Unfortunately they didn't grow at all.

Roots of seedlings didn't grow also. I made a decision to replant small mineral-wool cubes into hydroponic setup and watch how growing will develop then. I filled container of my setup with nutrient solution and turned aerator on. Then I carefully replanted seedlings into ceramsite and placed hydroponic setup into growhouse.

Every following morning I turned light in growhouse on and turned off every evening.
I've also shot short video to show how aeration occurs in my hydroponic setup.