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  #1  
Old 05-03-2012, 03:39 PM
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Is this some type of sponge? No not the zoas. The little ball with all the little arms. It's half black and half white.

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Old 05-03-2012, 04:12 PM
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Hydroids?
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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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Old 05-03-2012, 04:24 PM
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Hydroids?
No, I have been tested.
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Old 05-03-2012, 05:05 PM
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No, I have been tested.
Who was the lucky tester?
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Old 05-04-2012, 01:24 AM
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Default are those hydroids?
i got a blue ball very similar to that in my tank as well. when i looked at pics of hydroids they dont look the same...
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Old 05-04-2012, 03:21 AM
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I can't say for sure from the pic but it sort of reminds me of a kind of cyanobaterium: like cotton candy algae. Have you touched or poked it? Is it spongey or hard or loosely intertwined? If there are polyps that retract, then it's hydroids but it seems weird for them to grow in a ball like that.
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