I'm replying because I don't want you to feel ignored. I don't know anything about "blue urchins" but you may get better results if you take a look at the inverts on this website, find the urchin you're talking about and ask more specific questions.
I may be mistaken but there could be several urchins that would be refered to as "blue urchin".
Originally Posted by dmcoug9
Can anyone give me the specifics on keeping a blue urchin in my tank.
good water quility,sg at 1.025,live rock,
suppliment food with algea sheets
I have had the tank cycling for a couple of weeks there is a couple of damsels in their now. All my water reading are good. You can check out my set-up under the thread My first tank in new hobbyists. Planning on a FO tank or a FOWLR. It is a 55 gal.
Originally Posted by dmcoug9
I have had the tank cycling for a couple of weeks there is a couple of damsels in their now. All my water reading are good. You can check out my set-up under the thread My first tank in new hobbyists. Planning on a FO tank or a FOWLR. It is a 55 gal.
You could have a blue tux in that tank. Wait until your tank is at least 8 months old though.