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#1
04-20-2009, 10:32 PM
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ID Please
I found this patch of what I think is some kind of algae on the back side of one of the rocks in my tank.... Anyone have any idea on exactely what it is? Not a great pic but......
 Cheers Lawrence
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Cheers ________________________ 210g Mixed Reef 
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#2
04-20-2009, 11:06 PM
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Can't recall the name of them, but they grow really fast and you don't want them. I'm having a hard time getting rid of mine.
Good Luck.
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65 gallon mixed reef and 34 gallon mixed reef
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#3
04-20-2009, 11:15 PM
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Looks like Hydroids to me. You're in for some problems... they have a nasty sting and are nearly impossible to kill while still in the tank. A buddy of mine blowtorched his rocks to get rid of his.
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"We shall dive down through black abysses... and in that lair of the Deep Ones we shall dwell amidst wonder and glory forever." - H.P. Lovecraft Old 120gal Tank Journal New 225gal Tank Journal May 2010 TOTM The 10th Annual Prince George Reef Tank Tour
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#5
04-21-2009, 01:18 AM
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Yep hydroids as they said. I would blow torch it if I were you, it damages the function of the rock less than leaving it out to dry for a week, and ups the chance of actually killing those little bastards. They are tough!!
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#6
04-21-2009, 07:03 AM
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My new weapon of choice against hydroids is a soldering iron. I remove the rock and apply heat. It gives off the most wonderfully satisfying sizzle as they boil and the best part is that I can just put the rock back in the tank because it only affects such a small targeted area (unless the hydroid patch is enormous).
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