Nice come back on #4
Those cubes look like rapid rooters (ground up and pressed tree bark)
I still say you are over watering. When I use those to root clones I add water once over a 2 week period.
If you touch the cube with your dry finger and it feels cool and moist...no water needed....but if you must water them let them drain DO NOT let them sit in a puddle of water. If you are worried about the roots that are poking out of the bottom drying up...plant them in something bigger.
Light on during the night in veg will not hurt them... But neither will 72f.
Time to start inching that light down if you have not started already.
Those cubes look like rapid rooters (ground up and pressed tree bark)
I still say you are over watering. When I use those to root clones I add water once over a 2 week period.
If you touch the cube with your dry finger and it feels cool and moist...no water needed....but if you must water them let them drain DO NOT let them sit in a puddle of water. If you are worried about the roots that are poking out of the bottom drying up...plant them in something bigger.
Light on during the night in veg will not hurt them... But neither will 72f.
Time to start inching that light down if you have not started already.