Nuggs - did you autopsy that soil the grapefruit was in? I wonder if you raised yer ph gradually to toxic levels. I read somewhere recently about somebody who (eventually) killed one of their huge ass plants by adding too much mycos - like once a week - and they didn't check their soil ph til she died - and it was running at 9!. I'm no soil scientist and don't understand the mechanics of how ph fluctuates but I do know people always harp on how important it is to be in the right range