Yeah flush immediately and then start back up with nutes, maybe 1/3 strength. She doesn't look happy, but you have time to recover. Just flush with 3X your pot size... 9 gallons for a 3 gallon pot etc. Also maybe consider using ClearX, it will help get all the salt build up out of there. Last thing, grab those dead leaves in the pot... you shouldn't leave dead stuff laying around your plants as they are more suseptable to mold. Best of luck