Sea Urchin Care?

[esine]

What do I feed my sea urchin? He seems to be loosing his color and needles.

 

[Ron Popeil]

they eat algae typically. nori seaweed can help, as will the numerous types of macroalgae available for refugiums sold at most fish stores.

if theyre losing spines and color its most likely water quality that is affecting them.

 

[EaZy DuZ iT]

how big is your tank? Do a 10-15% water change.