Fire Urchin Cardinals Remove any uneaten food the

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

Assemble the chamber and mount it securely inside the aquarium before use

Ag-AgCl reference design supports stable pH measurement

Inspect the inlet filter at regular intervals and service clogged diffusers or restricted airline promptly

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

Fire Urchin Cardinals Remove any uneaten food theUrchins 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