My tank bred clowns spend most of their time in the top third of the tank as well, and they sleep near the surface. They are juvies and I've had them a month. As they are TB they likely had never seen anything besides glass and a clay pot before going in your display.
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40g Long since Mar 2012, 20lbs marco rocks, 25lb live rock, Aquamaxx HoB-1, sumpless, CPR Fuge, 4 tube T5HO, Mixed reef, softies and LPS
Current Tank Info: 40g Long sumpless
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