bitter basil??? Help

[rootspook]

GPS thanks for the response. I'll follow up with General Hydro and get back with you. To clarify I use 5mL/ gallon of floragro, 5mL/ gallon of floramicro, and 2mL/gallon of florabloom. I change every 2 weeks and was only flushing the plants with fresh water for 15 min or so. I'll flush more and try more frequent changes to see if it helps. I included some pics. The roots of the large plants have grown together but I was able to get a smaller plant out. I'm not sure if the plants are too close together I could alternate next time. Thanks again and I'll report back with taste results and the GH response.