Well, this supply chain crisis has hit a new low...is anyone else seeing this: for the first time in my over 50 years of pool ownership...I went to buy a gallon of Muriatic Acid and there is none to be found... My local pool store is out of stock, made a few calls, but none. Just happy to note that last winter I bought about five 4-pound bags of Chlorox pH Decreaser...I think it's sodium bisulfate (have not yet used any of it for pH adjustment, not sure how long a 4-pound bag will last during pool season, but I think I am good for the rest of the season anyway).