Nute lockout/Stunted growth after nute burn. Need help!!

So during week 4 of flowering I added a small amount of Bud XL to my girls which raised my ppm's to around 1300. I went above this with my previous grows so I didn't think much of it but it severely burned my plants. Yellow lower middle and some upper leaves with severe browning crisping and twisting of the tips. Since then the buds have barely taken up any nutrients and growth seems to have almost completely stopped. They are still drinking slowly. This burn also seemed to have caused a hermaphrodite because I began getting seeds close to week 5 and immediately sprayed with reverse and saturator. It has been almost a week since then and I have not seen any more seeds forming. I also flushed out all the old water and replaced it with new very low nute(300ppm) water. That was also about a week ago and it is now almost week 6 and I have seen almost no new growth since the burn. Also they still refuse to eat and drink very little. I am thinking about doing a short flush(30-60 minutes) with clearex and hoping that that'll help break up some salt buildup/nute lockout they may be experiencing. Btw I'm using a dwc setup in 5 gallon buckets. Any input?

Could you provide some pictures for reference?

Have you checked the pH of the water?

running at 300 is about the same as flushing, I would say run her back up to 600 and see what happens, if ppm drop try stronger.

Thanks for the replies. I'm not comfortable posting pics but they look just like this http://www.weedfarmer.com/cannabis/nute_burn01.jpeg with even crispier browner tips on many of the leaves and many of the leaves are yellowing and dying and the lower fan leaves are almost completely gone. I'm almost positive it's nutrient burn based on all the pictures I've compared it to and from what I've read. And it all began after I used Bud XL which I've read "may over stimulate certain triggers in the plant and this could lead to premature leaf shut down, or premature flower shut down". Also the PH was consistently dropping from 6.0 to 4.0 every 24-48 hours so for a while I was adding PH up to try to keep it between 5.8-6.2. And they haven't eaten anything in almost 2 weeks. But since I started the new lower ppm solution the PH has been more stable. I flushed last night in a ph buffered clearex solution for 30 minutes and put them back into a low nutrient solution(300-400ppm). I'll check on them again later tonight and hope that they show some signs of recovery. They appear to be drinking a little the past few days since I introduced the new lower ppm solution so I'm hoping they're bouncing back. Thanks for the replies

I maybe would try a flush a good flus. With no nutes for a short. Time then slowly try apdding so. Some Nutes the leaves reflect the roots ur roots are probably a bit burtn too