how long after the expiry date do you guys think the fungi would be good for because my bastard of a hydroponics guy just sold me some 2.5 year expired fungi which i didnt notice until i got home (I had to take the bus there and back... temp outside -32 celcius with windchill and its a 20 min walk from the bus stop) so you can imagine how fucking thrilled i was when i got home anyways the container says best before nov. 2005 is it a pile of shit now or still useable?