Hot Thai Pepper plant suddenly sheds tons of leaves

I thought my Hot Thai Pepper plant was doing well in the Bounty. It had been looking like it was on the verge of flowering. I hope I didn't kill it. In short, I had to add nutrients yesterday so I changed the water. I switched from AG nutrients to Hydra Greens. I trimmed the roots slightly. Today it must have shed 20-25 leaves :(