I did read that you should cover the top of the rockwool cubes with a sheet which does not let the light through…
I dont want to spend a lot of money. I have many cubes to cover. Also should I only cover each cube or the whole ebb and flow table at once?
I still have a roll of some blue plastic sheet here. Can I use that, or does it need to be white??? Does it need to be 100% light proof?
Actually what is the logic behind the cover? Is it because of algae growth, protection of the roots from light, less evaporation? Or is the covering not really necessary?