Mike,

You do routinely get that fuzzy buildup and wipe it off during 
processing, though, right?

Yes I do, it seems to come more often the longer I process it.


You don't usually see much on your filter paper, do you?
No, just a few specks here and there

Are you making it in the jar you're storing it in? I ask that because 
I do get some silver plating out on the inside of the glass I use to 
make it in. I have to wash that off periodically or it just starts to 
look bad. 

I've never actually washed out either of my storage bottles, so I 
don't know if I'd see the same thing. I can't see any darkening 
through the (already pretty dark) glass.

Maybe some of the silver comes out of suspension and coats the
glass. It would be interesting to test the as-made and after-storage
concentrations to see if there's a big difference.

I make it in one glass and then put it in the storage glass.  I will not
wipe it out this time and see what that will do.  

Thanks Mike for all your help.
Donna