Things you will need
You will need two pieces of pure .999 (99.9%) or better silver wire roughly 5”-7”. Some people prefer to use silver bezel (ribbon) instead of regular round wire, but either type is fine.I use Golden State Silvers 99.99% 6 inch 12 gauge wire. (10,12 & 14 gauges are common) Here’s a Discount Code and the link. CSB2021 Buy here
9 volt batteries are easy to get started with, or to have on hand in an emergency situation when there is no electricity. If you use batteries, you will need some copper wire. You can use a piece of an old extension cord or the cord cut from an old appliance (lamp, toaster, hair dryer, curling iron, etc.) To use batteries, you also need 4 alligator clips. Find these at a hobby, electronics supply, or an auto parts stores.
There are other types of inexpensive power sources — adapters or chargers — that can be bought new or salvaged from old cell phones, etc. This type of power source is economical, as buying new batteries becomes expensive in the long term. Simply cut the plug end of the power cord and add 2 alligator clips. The negative wire will usually have white markings on its insulation.
Look for a minimum DC output of 12V (volts)/500 mA (milliamps) up to a maximum DC output of 30V/3A (3000 mA). These numbers will be on a sticker or molded into the plastic housing. Some other sizes can work, too.
Other Things You Will Need
Steam Distilled Water is preferred. Zero or Deionized water may be used as well. Filtered or spring water contains minerals that will alter the process. In an emergency, use the purest water you can find.
Green Scotch Brite cleaning pad, to clean the silver wires.
A laser pointer. To show reflecting particles and to gauge ppm. Simply cat toys work as well.
A glass jar in which to make your colloidal silver. About a quart size is good to start.
TDS (Total Dissolved Solids) or Hanna Meter (optional) to measure PPM (parts per million) of dissolved minerals and ensure purity of the distilled water you will use. Most distilled water sold in the US is reliable, so a meter is not required equipment.
A funnel and coffee filters (optional). To filter finished brew if preferred.
Storage containers. I prefer Amber glass for storage as Colloidal Silver can be sensitive to light. Clear containers are ok if stored in a darker area. Food safe plastics are ok as well.