IMO- Potentially $600-$1,000 worth of smoke on one plant.
@ $0.15- $0.20 to make a gallon of nutrients. It's not worth keeping it. Learn from the mistake, and don't mix up so much nutrients.
Think about it...a DWC can go how long? Should be no problem. Running an air stone is a must though. My general rule is if it smells then throw it out.