| http://www.w3.org/ns/prov#value | - #19 badxgillen User Aquariums hmmm pencil urchins dont inflict painfull wounds so you can gently take it out if you must but i personaly like the urchins in my tanks they are mostly reef safe they will consume allalgaes including macro and calcerous.as far as the light you could hang it fromthe ceiling or a fixed mount.
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