Im running an ebb and Flo system with 2 600 w LED’s for 3 plants. I’m a few weeks in to flower and noticed about two weeks ago that all the leaves were starting to curl down. Since noticing this I have drained my reservoir and flushed plants with just water. After doing this and seeing no response by my plants I used Florakleen and then started back at square one with nutrients. It has been about 3 days since I did this and still see no response to the leaves coming back. My ph level is exactly where it should be and the only nutrients I am using for flower is GH MaxiBloom. The only thing I have done differently than the past couple grows is use fox farm nutrients during the flowering stage. Could the two nutrients together cause this? Any help or suggest what to try next would be greatly appreciated. I have attached some pictures so you can see how bad they are curling.