Fire Urchin Cardinals but the correct concentration is

but the correct concentration is important because excessive copper can be harmful to fish and is unsafe for invertebrates

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Remove any uneaten food the following morning and adjust later portions as required

and should be kept in an aquarium of at least 180 gallons for a single individual

Fire Urchin Cardinals but the correct concentration isUrchins have sharp teeth at their center which they use to scrape algae, including coralline algae. They are able to scratch acrylic so are recommended only for glass aquariums. Echinoderms such as urchins are extremely sensitive to changes in the water quality. They require well established aquariums for both water stability and sufficient food supply. A spectacularly colored creature, the Fire, or Red Radiating urchin is one of the most beautiful