My fiance and I are growing Hydroponically and his leaves have curled upwards and are looking burnt on the tips. Can anyone tell us what's wrong?

Here are the conditions:

5 gal planter
platform holding a quart sized container
River rocks & glass beads in qt cont.
under a vanity
heater between 80-90
Miracle grow enough to make water viably medium to light blue
Spring water
Black light and energy saver light 60wat
gidget24 Reviewed by gidget24 on . Burnt? My fiance and I are growing Hydroponically and his leaves have curled upwards and are looking burnt on the tips. Can anyone tell us what's wrong? Here are the conditions: 5 gal planter platform holding a quart sized container River rocks & glass beads in qt cont. under a vanity heater between 80-90 Miracle grow enough to make water viably medium to light blue Rating: 5