We do not provide advice on making colloidal silver at home. Many companies sell colloidal silver generators and dozens of web sites provide information for experimenters and home hobbyists. All the machines sold for making colloidal silver use an electrolysis process and make ionic silver. There are no machines sold that are capable of making true colloidal silver. Please do not email questions seeking advice on buying, selecting, using, or making this type of equipment, we cannot provide any help, sorry.