Highly concentrated solution for adding rubidium if there are deficits in the aquarium.
Rubidium is an alkali metal and, like all alkali metals, is distributed evenly in the sea, whereas the concentration is only 120 µg/l (ppb). The precise biological function of rubidium is still unclear. In reef aquariums, it is believed to be beneficial for coloration and skeletal hardness.
Chemical symbol: Rb
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