how long should it take to make a glass of 10ppm silver with sota pulser or silver puppy?

how long should it take to make a glass of 10ppm silver with sota pulser or silver puppy?

if the black shows up do you have to stop and clean it
?

i heard its poisionous and full of positive ions?

does it need to be in the dark?

is there anything you can add to make it faster or better?