As long as he keeps it refrigerated and it was refrigerated before it got to him, it should be fine. Its the only product that's been proven to work. The crap in bottles on shelves is just that - crap. Despite what they claim, they do not have the correct bacteria. Only BioSpira does. And it really does work. I have 15 tanks and almost all of them were started with BioSpira and I've never lost a single fish to cycling issues.