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- Apr 13, 2019
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Dude...do not underestimate the amount of algae in this tank! To be honest, I'll be quite surprised if they actually ever eradicate all the algae from this tank!I have a rock boring urchin. Just 1 in a 65g. They will carry things around just not as much or as frequently as a tuxedo. They will knock your frags all over the place, and anything else too. Destructive little guy but I still love him. 9 in a 40 g will be like Godzilla in Tokyo. You will probably have to supplement them already tomorrow to keep them from starving.