Was using silver water for my cat Bella's bladder infection. Seemed to be taking too long. So for a few days I added one drop of the Serum to a dropper filled with silver water for the first day. For the next 2 or 3 days I put 1 drop of the Serum in her water bowl plus 1 drop of the Serum in the dropper of silver water once a day for three days. So glad to see the large pee ball in her litter that day! And no more straining! This product is a Godsend. I will always have it on hand. Thank you!