hydro veggies taste more like they were grown in soil?

[Chemical boy]

Hi Ron, great place! My question is how can I make my hydro veggies taste more like they were grown in soil? I've got the hydro thang down except for this last mystery. I'm using general hydro 3 part formula...I'm not sure if I need to just run straight water through the ebb and flow the last week of flowering or if there's an additive that I can put in the water. Any tips for a less chemical taste?

Chemical boy