Colloidal Silver goes "bad" when the particles fall out of solution because of exposure to light, or extremes of heat or cold. If Silver Colloid turns dark, it is in a more irritating oxidized form. I commend making fresh Silver Colloid with distilled water using two 99.99 FINE SILVER WIRES and three 9 volt batteries connected in series, red-to-black to get 27 volts. In short, there is no reason to rely on expensive commercial Colloidal Silver . You can make it for pennies a gallon!

Email me at: nordskoven@yahoo.com for instructions if you like. I get my 99.99 FINE SILVER WIRES, 14 gauge, at C.C. Silver & Gold, listed on the net. I just send them a check and tell them to forward whatever length of wire it covers so I avoid going back and forth getting quotes. Use scraps of FINE SILVER WIRE, NOT STERLING, in filters to avoid slimy scum inside the filter tank.

Hello !
It's definitely not true. By time, the the silver particles ly down on the botton of the bottle and probably are not colloidal any more.
The manual of CS generator says that 2-3 weeks storage is the maximum.