colloidal silver question

i recently started some Mesosilver brand Colloidal Silver . it was really expensive, but apparently this brand is by far the best (greatest surface area for the particles). im thinking about buying my own generator, but was wondering about the risk of agraria (sp?). this is where your skin starts to turn blue/grey from the accumulation of silver. what do you Colloidal Silver people have to say about this? is it safe to make my own CS?

if so, whats the best generator out there that i could buy (keeping in mind price)?

thanks for the advice.