It was BRSproduct and was vacuum sealed.The BRS folks were saying somewhere that DI resin that is exposed to air while stored would not last as long. They vacuum seal their stuff. I bought a 1.5 gallon bag that they only recommend if you are going to be making a lot of water in a relatively shorter time because once the seal is broken the DI resin life will start decreasing. At least that's what I understood from what they were saying. Was your replacement resin stored for a long period? Was it in a vacuum packed bag?


