Ok, I was wondering I have been taking the 1200’s for about 3-4 weeks now. And 600’s for 2 weeks last month. I bought both style breathing devices you suggested. I can’t wait to try them. I have some very stubborn mucus in there and it’s driving me bonkers along with shortness of breath. I am feeling a little stronger physically the last week or two but can’t shake this lung congestion. I describe it to people like having a scratched eyeball as far as it being a continuous and agonizing feeling.