I've been reading on several sites about people using used duck water on their vegetable gardens as liquid fertilizer. Is this okay? Isn't there a risk of salmonella? I compost my chicken's poo for a year before using it, but I don't really know what to do with all the water from the duck pool and water bowls that they bathe and poop in.. besides just dump them in the grass. If I can use the waste water in the garden, I would love to, but not at the risk of my family's health. Please confirm or ease my fears if you can!