It hasn't been a problem for my little BTA. I found him at my LFS nestled between 2 larger BTA's and none of them looked worse for wear.  I suppose it depends on if they want company/competition or not.
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Marty
72g Bow Front, 2x250w MH (10 hrs), 4x65 Act (14 hrs), 6xDual Moonlights (10 hrs), 300 gph from cannister filter and powerhead, Prizm hang-on protein skimmer, 50 lbs LR, CC Bed
Yellow Tang, 2 Clowns, Bubble Tip Anemone, 2 Yellow Tail, Humbug, White Spot, Ornate Goby, Emerald Crab, Sally Lightfoot Crab, 2 Blue Legged Hermits, 15 Scarlet Hermits, +Snails with no names (margaritas, turbos, astraeas) | 
BTA vs BTA 
