hi i have one question and i ask that everyone who sees this does not ignore it..i am growing hydroponic tomatoes and have been having problems..To start, one day when i came home i noticed that the bottom leaves were yellowing. i let it go for a few days because i believed it was simply a normal thing that had to happen.after a while i noticed that the yellowing was climbing up the plant. i diagnosed this as a nitrogen deficiency. I took some schultz 10-15-10 liquid plant food and added about 5 drops out the recommended 7 drops per quart of water to my reservoir...okay i added the nutrients last night and now my plant is extremely weak and is wilting..can someone please tell me whats up.Btw my reservoir is about 1 and a half gallons of water..Thanks