are the LEDs a recent upgrade?.....could be light shock if they LEDs were a recent upgrade......as for placement.....its almost impossible to recommend where to place them......zoas are collected from an incredibly wide range of "zones"......anywhere from tidal zones that get exposed to the air at low tide to deep water zones that get relatively little light.....best thing Ive found, is to glue frags to a medium sized piece of rock that you can move around to see where your zoas are happy......
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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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