Hey Shrooms i just seen this, i had a few some time ago which showed all sorts of deficency signs and trying to rectify the problem i ended up killing them. A friend suggested to me that the dirt i made up for them was too 'Hot', i mixed up a good organic potting mix with mushroom compost, perlite, cow manure then potted the plants, what i failed to do was flush the pots out proper and there it all started. Did make sense to me after the fact mate. Hope alls well otherwise mate.