Noticed a slightly yellowing of the veins and a few parts of the leaf, immediately flushed with clean clear water. hopefully it will further prevent any damages. im assuming its the gravity added in with the nutrients that are resulting harshly to my plant. might be cuz they are smaller than normal grows, but its some serious stuff, real concentrated even at half doseage. But i did do a test pinch on the 2 ive watered gravity to and noticed its getting alot firmer compared to the other ive watered without!, some of the buds look like they are growing 2-3 cylax out of the same area, kinda neat, like stacking on top of each other. This stuff is strong! but it does what it says, i seriously recommend u try it without nutrients at first to see how you like it with your grow, and if u decide to use nutes, scale back alot, i say use 1/2 strength as your full strength mark and mix from there. if it calls for 20ml for full, use 10ml and call that ur full mark. good luck to users with this product! will post the weight, density, and smoke results from the 2 ive used it on!