The proper mix for those nutes per/gallon for flowering is:
5ml of gro
10ml of micro
15 ml of bloom
I would try that at half strength first. Use that amount of nutes, but in TWO gallons of water. Mix the micro into the water first. Then the other two. THEN put it in your reservoir.
What you have there, I think, is a nute burn caused by lockout. Did you mix the micro directly into the others before adding water?
Your nitrogen is a little high, either way. That's the "gro" part. 5 ml per/gallon is the ABSOLUTE strongest it can be used. 6ml will cause burn.