Questions are good lol so its cool
I have the3 double fixtures of t8 flourescent bulbs atratched to the lid of the tub, so six bulbs total..
I soak my rockwool cubes in 5.5ph water for ten min, then set them on the tray to have the fresh clones stuck into them. No I don't use any nutes at all. Nd I don't let them stand in open water.
I spray them with 5.5 ph water all the time, so as the keep the rockwool moist...
I'm not sure what else to say just keep.ya eye on em...
Hope i could help

PGS420