Bought some of this from Home Depot. It doesn't have the potent fumes of the MA from my pool store. Nor is it the yellowish color. How do you tell whether it's still effective? I want to say the label has 01/13 on label. Hoping that doesn't mean it was formulated in Jan 2013?
HDX 2x1-Gallon Muriatic Acid 2118 HD at The Home Depot - Mobile
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HDX 2x1-Gallon Muriatic Acid 2118 HD at The Home Depot - Mobile
Sent from my iPhone using Tapatalk