It's always been refridgerated. But, I did get it from my LFS and my area is pretty hot 90s in the summer. So maybe it went bad during shipment. I dunno.Yeah definitely. Did you keep it refrigerated? Possible it went bad on ya if you left it out of refrigeration for too long. I am generally familiar with reef nutrition because I use their R.O.E. and oyster feast, etc. but I am not as familiar with that particular product.
It's always had that smell to it since the day I opened it.