I purchased the product from Home Depot. I put one packet in and the tub was still a little slow so put the second one. I left the house both days. When I returned the smell was very, very strong. I went upstairs to the bathroom and much to my surprise, my bathtub is messed up. It has something all around the tub, some type of stains, I guess from the fumes. I have been scrubbing for two days. If anyone has had this problem what did you use? So far nothing has worked. The drain is better but too much expense.
Bottom Line: No, I would not recommend this to a friend
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