Hey listen, like I said i did that with the 3% h2O2 myself when i first started and was just trying to learn and experiment myself. This is what happened. All of the leaves looked exactly like that. I used tap water then added AN Grow A+B, and B-52 , and Voodoo Juice and some of that 3%H2O2 as instructed on the bottles then balanced my pH to 5.8 with general hydroponics pH down. I didn't know i was killing all the good bacteria in the roots and adding toxic chemicals to my res. All of my leaves fell off and the plant was all twigs for 2-3 days but my roots were still thick and white. What i did was replace the water again and used the nutes with half strength and balanced the pH to 5.8 again. The plant began to show leaf buds at all the spots it had leaves before. In about a week and a half to 2 weeks time the plant came back and was growing even better than before. I later learned to add other beneficial bacteria and sugars and other enzymes that the H2O2 would disrupt and have never had a pH issue or nutrient deficiency issue again. I also started using RO water so the chlorine and flouride and other additives put in public water supply and add cal mag to increase the ppm to 150 and buffer my nutrient solution. The cal mag replaces the lost calcium and other micronutirents that are necessary for plant growth that is filtered out by your RO filter as well.