Yeah, don't flush then, FF has several nutes already and it will prolly make it worse. Just go with pH adjusted water for a while and they should settle back down. I'd give them until they were about twice the size they are now before trying to feed again, unless they show signs of deficiencies. That will give them enough time to use up some of the existing nutrients and larger plants are a little more forgiving. The 1/4 recommended dosage is a good rule to follow too.