missgeek

use brine, 12v and carbon electrodes. if doing it by electrolysis. if not and you need a lot of chlorine use potassium permanganate and hydrochloric acid as strong as you can get. brick cleaner has a high percentage of hcl. you need to produce it in a safe place with adequet ventilation i.e a fume cupboard as the slightest bit in your nose could hospitalize you