tomatoes started to wilt
 

Please help!

My tomatoes were thriving under my 400W MH grow light, on 14 hour days. In fact, they were blooming like crazy and the little tomatoes were about the size of shooter marbles. Then disaster struck. They started to wilt. The wilting just continued for about 5 days. I changed the nutrient bath to straight water, I even cleaned out the tank and all the parts. I'm wondering if this could have been caused by the MH lamp? Would switching to a HP sodium have saved my babies? Or does this sound like another problem. This was my first crop and I was so excited to see them fruiting. Any help would be greatly appreciated!!

Erik - erik@fencefarm.com

If a plant just wilts overnight it is most likely pinch off where the capillaries are cut off and the plant dies. If all the plants wilt in a garden then it is a root problem cause by a solution or pH problem. You did right by flushing and changing the solution.
Lights shouldn't have anything to do with wilting.