Can I use a flushing agent to cure N Toxicity?

Hey everybody,
Today I barely noticed that my some of my plants are showing signs of N Toxicity. One plant is branchy, has dark green leaves, and is generally smaller in width. The other has bright yellow new growth and the old leaves are getting darker.

So my question is if its possible to use a flushing agent such as Final Phase or Clearex to help speed up the flushing process or will these agents just such the nutrients from the fan leaves and only make matters worst?

Sure don't see why not.
Not really necessary. Straight water will do.

nitro burn will show and new and old growth with the very end of the leaf tips browning off/dead. if the new growth is yellowing i doubt its nute burn. if u have been feeding for a while and there is alot of salt build up then go for it , use a flushing agent. BUT imo i would post some pics it could even be a deffiency from a toxicity / to much P Locking out calcium etc..

Here are some pics. The first one is from my wildfire og clone. Some of her bigger bottom fan leave tips are already clawing down and the new growth is a bright lime green with some yellowing.




The next pics are from my platinum og kush. Her leaves are not as wide as the other leaves, they're very dark in color, and her growth has been very branchy.




So do you think I have just been over feeding them or is there some deficiency?

Anybody have any info on my current problem?