Well after some more research and some phone calls the EPA says that if it has a registration number the company must only use the product in the manner stated on the label or a fine could be imposed. The three brands of Chlorine that I have used are from a pool supply company, Walmart, and the hardware store all having an EPA number. So I have to find a brand that has no EPA registration number on it. From everyone I've talked to they don't have the numbers on their brands so I guess I'm just lucky. I'll buy in bulk from a chem supplier, problem solved.