Fire Urchin Cardinals Do not worry if small

Do not worry if small resin balls remain in the substrate after nutrients are released

Flipper Standard Float Use Directions

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

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

Allow at least one hour for settling

Fire Urchin Cardinals Do not worry if smallUrchins 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