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Rainbow Slate

While you might hear aquarium slate rock and imagine a deep black stone, our rainbow slate is actually a light, multi-colored stone with a marble-type surface. Slate is a type of metamorphic rock that is an ideal choice for hardscaping your aquarium. Made from compressed sedimentary rocks, slate is completely inert — meaning it won’t affect the pH of your water. Learn more about our slate options when you check out our selection today!