need help plant is going down hill fast

[apichot]

Hi all. I have one of my Roma plants that has gone down hill in the last couple of days. The leaves have brown spots all over them mostly the ones in the sun and most of the plant is wilting. This plant is growing in a hydroponic deep water culture and I'm afraid that it has some sort of nutrient deficiency. I am attaching pictures. I'm hoping someone has some words of wisdom because I'm at a loss. If it helps I am using GH maxigrow and maxibloom.