ID Please

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The guy at my lfs hooked me up with this macro, free of charge, and I was wondering if anyone could ID it for me?

 

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he also said it doesn't need to be planted, it can just hang out.

 

[tru conch]

looks like spaghitti macro.

 

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can you tell me anything about it? is it good for a fuge? Does it grow fast? I have it under 130 Watt PC's in a ten gallon fuge.