i never had any problem with my 1.5 year old FO tank. but 3 weeks ago, i bought a frogspawn coral and added some light. the tank began to grow a little bit of diatome where the light shined so i cleaned it off and removed the lights. i looks clean again until i did some inspection and saw this thing growing on the rock. what can it be?
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<table style="width:auto;"><tr><td><a href="http://picasaweb.google.com/lh/photo/ewf_tqUUdNjjifHv98qrMg?feat=embedwebsite"><img src="http://lh4.ggpht.com/_tWdz-MUyBGs/TGcXCVTHDxI/AAAAAAAABno/EP6Ifu2cCxQ/s144/IMG_0298%5B1%5D.jpg" /></a></td></tr><tr><td style="font-family:arial,sans-serif; font-size:11px; text-align:right">From <a href="http://picasaweb.google.com/rookieyear/Id?feat=embedwebsite">id</a></td></tr></table>
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<table style="width:auto;"><tr><td><a href="http://picasaweb.google.com/lh/photo/ewf_tqUUdNjjifHv98qrMg?feat=embedwebsite"><img src="http://lh4.ggpht.com/_tWdz-MUyBGs/TGcXCVTHDxI/AAAAAAAABno/EP6Ifu2cCxQ/s144/IMG_0298%5B1%5D.jpg" /></a></td></tr><tr><td style="font-family:arial,sans-serif; font-size:11px; text-align:right">From <a href="http://picasaweb.google.com/rookieyear/Id?feat=embedwebsite">id</a></td></tr></table>
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