Urchin
 

I had a sea urchin for about 8 months and it died today. I have a 14 gallon bio cube so Im wondering what happend? Im guessing it ran out of algae to eat but I dont know a lot about fish tanks and I want to get another one someday, what can I do to improve my tank?

That's a pretty open ended question.

Have you done any water tests?

Any changes you've made recently?

Did you notice any changes in appearance or behavior prior to death?

Tell us more about your tank.