You say that your leo was fine, then today became very stressed and aggresive? Do you also have cats in the house that might have been able to tap on the glass and stress out your leos? I had a leo that stopped eating for some reason and when I moved her to a higher rack, she started to slowly chill out and become normal again and eat. I later found out that my cat liked to tap on the rack when the leo moved towards the front of the drawer. The cat of course was intoduced to the water bottle on "Stream" mode. 
I've had the best luck feeding my leos at night. Also, I always have a bowl of mealies in their enclosure to make sure that they have some food when they want.
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LEOS:
1.0 Tremper Giant Albino (Diesel)
0.1 High Yellow (Ayla)
0.1 Hypo (Red Sonja)
0.0.3 Juvies (Dremel, Ryobi & Mufasa)
R.I.P. (Conan)
CATS:
2.0 Maine Coons (Sam & Tye)
FIANCÉE:
0.1 Tall Blonde (Christine)