Rusty is often a K def, and Pale is often an N def or heat stress.
That's early to be showing the pre-harvest N def; it should not appear significantly until about the last 2 weeks before chop.
Go ahead and do a foliar feed with a weak solution of your bloom nute, with maybe just a bit of grow fert mixed in too to give a SMALL nitrogen boost.
Check the pH of your runoff out of the pots to eliminate pH problems (lockouts) as a cause for the problems.
Find that usb cable! Pics are pretty important in a case like this.