Anyone know about sea urchins?

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143gadgets

Aquarium Advice Activist
Joined
Oct 6, 2004
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142
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Washington, DC
my sea urchin let all these little grey pebbles around him. I think it might be his excriments, but there is so much of it that it seems unlikely. Does anyone know what they might be?
 
jeez is this gonna mess up my levels? Will it be too much fr my tank to handle? My tank is only a little over a month old.
 
What kind of info are you looking for?
I've had my urchin for about 2yrs. It was a lr hitchhiker. They are cool. Wait til you see it shoot florescent liquid into the water. LOL Again, perfectly normal according to my experience. I've never had my urchin have any bad effects on my water in anyway.
 
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