Hello, Would it be feasible to neutralize the effects of a 3% sodium hypochlorite and water solution by adding an appropriate proportion of an 85% sodium percarbonate powder and water? What would the appropriate proportion be to facilitate this premise? Would the resulting reaction be safe if performed in an open outside environment? I will be using the chlorine solution to clean algae off of my roof but i am worried the SH solution will damage my plants. So the idea is to soak the surrounding vegetation with a sodium percarbonate and water solution that is proportionally correct to accomplish this task. Thank you.