Copy pasting what i wrote on the other thread.
Silver does not dissolve in water. The distilled water you use will certainly not be clean for very long, among other things, it will take up CO2 as soon as it comes in contact with air and become slightly acidic. Something silver will be dissolved as ions, but in very low concentrations and very probably not enough to have any effect at all.
Is there evidence that silver prevents organic fouling in the water cooling system? No, absolutely nothing. In forums around you will find users who claim to have good experiences with silver and you will find users who claim that the silver does not have any effect, it grows anyway.
A prerequisite for organic fouling is the presence of microorganisms. Using new and unused components and only distilled water can get a water cooling system free from organic fouling. Feel free to choose to use silver as well, but the absence of fouling should be attributed to the absence of micro-organisms and the presence of silver.
What about the galvanic corrosion, silver would be a danger in this respect? Proponents of silver would argue that there is no risk and refer to the galvanic index. It is a mistake. The galvanic index applies to metals that are in contact with each other and are not relevant. For two metals immersed in electrolyte (coolant) must be risk assessed based on Standard Electrode Potential. On the table is unfortunately silver is a good distance away from other metals such as aluminum, chromium, nickel and copper.
You should just use destilled water, mixing different metals is not good for your system as it will trigger corrosion