No there is not. It really is personal preference. Just make sure you have two kinds: one with d3 and one without. The one without is the one you use daily and the other one a couple of times a month. I use Sticky Tongue Farms Minerall. A lot of people use the Repashy all in one but it does contain small amounts of d3. I keep my chams outside everyday, so I would not use this product daily. That is just me personally.