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Old 02-04-2006, 07:39 PM   #1
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Molly Developing New Black Spots - Pictures Included

Hello everyone,

I have had a yellow/golden male molly for about 4-6 months now. In the last few weeks he has been developing black spots on his tail and side fins. They don't look like a disease or anything but I wanted your opinions. I did start feeded my molly better food with "cromacolor" that is supposed to bring out the colour more. I don't know if thise could be doing it or not.

Any thoughts? My water quality is perfect with Ammonia=0, Nitrite=0, Nitrate=<10.

I have had a couple unexplained deaths in my fish tank in the last 3 weeks. No real signs or symptons, just a dead molly.

Here are some pictures of the molly I'm concerned about.

Thanks in advance for any help
Attached Images
File Type: jpg molly2_181.jpg (68.7 KB, 1270 views)
File Type: jpg molly1_130.jpg (61.0 KB, 948 views)
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Old 02-04-2006, 08:19 PM   #2
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It could very well be a natural colorization. Nice pics btw. If she is eating the same and acting the same I would guess it is nothing to be too concerned about. Just keep an eye on her and keep your water the way you have been.
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Old 02-04-2006, 08:23 PM   #3
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That is a very pretty fish. I dont think you have anything to worry about. Probably natural coloring as Zagz said.
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Old 02-04-2006, 10:07 PM   #4
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Thanks, it's sometimes hard to get a decent picture with reflections, etc.

So even though this is a mature fish and is just developing the black spots now, you don't think there is much to worry about? I would hate to lose this one on something I could possibly fix.
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Old 02-04-2006, 10:07 PM   #5
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-opps double post, sorry
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Old 02-04-2006, 10:24 PM   #6
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I think its just natural coloring coming out. Probably some black mollies in his breeding lines.
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Old 02-05-2006, 02:03 PM   #7
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It certainly doesn't look like an illness, you can think of it similar to people in this regard, our bodies continue to change as we get older, why not fish?
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Old 02-05-2006, 06:47 PM   #8
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I can agree that fish will change size and appearance, it's just the speed at which the spots developed were over about 3-4 weeks. The only thing that I have really changed was feeding them different food.

I'm also almost certain that there are black mollies in his breeding lines because the store that I buy them at have a lot of similar mollies, with some black in them.

Are there any possible diseases that would have these kinds of black spots as a sign?
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Old 02-05-2006, 06:53 PM   #9
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I think it's natural color change with age as well, I have had this happen in the past, and since you said you added color enhancing food, somehting might have sparked it... but I have had fish do this as well, looks great and super healthy.

Beautiful fish BTW
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Old 02-05-2006, 08:46 PM   #10
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Thanks, I do think he looks very healthy, and I hope it's only just a natural color change in combination with the new color enhancing food.

Thanks for everyones help!
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