nice facility,
The rockwool cubes are sitting on the trays for the smaller cloning cubes? is that in order to protect the roots from light once the matt up on the tables?
Im glad you asked about that. Frankly i am surprised at the lack of interest surrounding the trays, your the first to ask. I dont know of anyone else who uses them either.
First, i do it for drainage, it helps break the water tension in the cube and they drain around twice as fast as sitting bare on the table.
Secondly, i do it for the ridiculous, fat, white, fur covered root growth.