The best way to have unlimited free silver is to purchase 2 pure silver coins. Drill a small hole in them.
Hang them on a plastic rod and lay the rod across a glass jar filled to the rim with water. The coins should be immersed mostly in the water without touching each other then touch a nine volt batter to the part of the coins above water. One coin on the positive and one coin on the negative. The jar of water will quickly cloud up with colloidal silver mist.
Two coins will give you a life time of colloidal silver and I have used it to save MANY plants.