I agree. My res, tray, hydroton and lava rocks all cleaned by light bleach and water. The proof is in the pudding, check out my current grow. Plants have original leaves, stalks are as big as a pencil, 9 finger leaves and all still under T5s vegging for 13 days. A high percentage cleaning  peroxide and not rinsing well can kill a plant like too much bleach and not rinsing well enough can do. Just my crazy fn opinion. 😉😀