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Old 03-29-2013, 06:51 PM   #1
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My tang has a big black spot on the side of him and i was wondering what it could be hes been kinda just floating around
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Old 03-29-2013, 07:09 PM   #2
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My tang has a big black spot on the side of him and i was wondering what it could be hes been kinda just floating around
Out of curiosity is it flicking/scratching?

Off hand it could be a few different things such as Black Ich which is basically an infestation of flatworms or it could be Ammonia/Nitrate Burns, stress can even cause them to develop black splotches as well as lose color.. What's your water parameters?
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Old 03-29-2013, 07:34 PM   #3
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I guess you could say flicking and scratching but more just like laying on the bottom of tank breathing heavy.

Nitrate-0
Alk.-300
Ph-7.8
Nitrite-0
Dont have an ammonia tester
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Old 03-29-2013, 08:14 PM   #4
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How long have you had him? If he is in a 30g (is that right) tank he is most likely really upset by being so cramped and would say it is only a matter of time before he goes.
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Old 03-29-2013, 08:47 PM   #5
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Ya hes in a 30 gallon hes been here for about 3 months i was planning on taking him back when he got bigger but i guess right now would be the best time.
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Old 03-30-2013, 12:16 AM   #6
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The black is really starting to spread
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Old 03-30-2013, 12:25 AM   #7
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The black is really starting to spread
Have you tried doing a water change??
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Old 03-30-2013, 02:01 AM   #8
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Ya i did one a couple hours ago but he didnt make it, i've never seen it before the black was all over him and it wasnt little dots it was a almost likt whis color changed.
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Old 04-01-2013, 01:30 PM   #9
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Had it been eating? If so, what?

As was pointed out, putting Tangs in small tanks will usually stress them. There is not a Tang out there that is meant to go in a 30g. Koles, Tominis and a few others can thrive in a 75g, but most others need 120g or more. The 75g for some Tangs is a recommended minimum size, which I have always read as being okay for the minimum size Tang. Almost every thread you see on here with a "my Tang has problems" comes from a Tang that is in a "too small" tank. IMO, that is not coincidence.
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