longspine urchins CAN get to be the size of a basketball....realistically they often parish before they reach that size in our aquariums....one would probably at some point need to be re-homed in a tank your size....fortunately they arent that hard to catch.....
I recommend these to everyone with a smaller tank so I might sound like a broken record but......I love assessors....I have both a yellow and a blue....they stay small, are pretty and are very mild tempered
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260g mixed reef, 105g sump, water blaster 7000 return, Bubble King SM 300 skimmer, Aqua Controller Jr, 4 radions, 3 Tunze 6055s,1 tunze 6065, 2 Vortech MP40s, Vortech MP20, Tunze ATO, GHL SA2 doser, 2 TLF reactors (1 carbon, 1 rowa). http://www.canreef.com/vbulletin/showthread.php?t=50034 . Tank Video here http://www.vimeo.com/2304609 and here http://www.vimeo.com/16591694
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