Never. I soak babies of every species every day until they reach about 100 grams. After that, I start skipping days now and then. By the time they are 5-6", I'm usually down to 2 or 3 times a week. Large adults get soaked less often in winter, but 2 or 3 times a week in summer.Tom, I was wondering at what age or size do you stop with the bathes?