>>12012975 LB
I am another anon lurking since November 2016 and I own the most successful colloidal silver generator business on the planet (we have sold over 30,000 units since 2012)
https://lifeforcecolloidalsilver.com/
We also sell on Amazon and Ebay
depends on the gauge and the concentration you make 14 gauge will make about 75 gallons of 15 ppm, 12 gauge about 110 gallons and 10 gauge 150 gallons
our machines are designed for silver, but feedback is they will make colloidal copper and gold as well but slower
you can buy 9999 pure copper and gold on Ebay
https://lifeforcecolloidalsilver.com/