Its easy to make your own and theres alot of very good generators which produce very good Colloidal Silver . I dont know much about your brand of Colloidal Silver but I suspect it is fine unless its ionic. As long as you dont make massive particles and make the bio-degradability low then you will be ok. As long as you follow instructions properly, you will never get worse and only better!

Some place in the U.S. has a little probe that will tell you what the strength of the solution is.
It is a must for every home maker of C.S., I would think.
...and the store bought stuff may be "not great", and testing would be good there too.
Lets all get tester!
Karlin
Between supper and phone!]

just go to geocities.com type in Colloidal Silver generator. he has the best, I brought one from him.