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Old 09-16-2014, 07:10 PM   #1
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Ich?

We are doing a fish-in cycle with Danios (we are planning to have a large school of Danios once the tank get's established so I'm getting throw away fish just to cycle). We got 9 of them last Tuesday. On Sunday I noticed a white spot on one of the big ones. Just one spot and I'd almost call it more of a discoloration. It doesn't look like the pictures I have seen of Ich - but I have also never experienced Ich first-hand.

I noticed this for the first time Sunday morning. The spot has not changed at all and I have kept close eye on the other 8 danios - no spots on any of them. They are the only inhabitants of a 75 gallon tank. If it matters, the parameters are pH - 8.2, ammonia, nitites and nitrates are all still reading 0.

Is it Ich?Click image for larger version

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Old 09-16-2014, 07:13 PM   #2
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I circled the spot on this one.
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Old 09-16-2014, 07:51 PM   #3
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Spoke too soon. Looks like I have another Danio missing an eye. Not sure if this is related.
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Old 09-18-2014, 10:20 AM   #4
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Pretty fish.

Not sure on the eye but that spot looks like it could be bacterial infection (columnaris or something). Is it kind like a lesion within the scales and not hairy above the scales?
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Old 09-18-2014, 12:46 PM   #5
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I wouldn't really call it a lesion... more of just a blemish. Other than the color - you can't really see any difference in the scales. I'll try to get a new pic tonight to compare if it has changed any since this one was taken.
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Old 09-18-2014, 12:48 PM   #6
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This guy might just go back anyways - he is mean - keeps chasing the smaller Danios around the tank whenever they come into its "area" (which is pretty much the entire center area of the tank).

If this is bacterial it would likely infect the other fish too, right?
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Old 09-18-2014, 04:07 PM   #7
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Fish In Tank Cycling

Hello Loto...

9 fish in a 75 gallon tank is hardly enough to cycle it. I needed that many female guppies to cycle a tank less than half that size. You need a steady source of ammonia and 3 to 4 fish the size of a Danio is needed for every 10 gallons of tank water.

I'd recommend a dozen more Zebras and add a good water filtering plant like Hornwort to help maintain a bit better water conditions.

Just a suggestion, it's your tank.

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Old 09-18-2014, 05:14 PM   #8
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Thanks. I've been figuring we might need mor fish soon. It's been about 10 days now with no ammonia nitrites or nitrates. We did use a used filter from our twenty so I figured that might be keeping the levels undetectable, but have been thinking about adding more. Although I really don't want to put any more fish in this tank until I am sure the tank is not infected with anything.


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Old 09-18-2014, 05:39 PM   #9
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New pictures from today. The spot actually looks kind of better - maybe?

But I think he is going back to the store anyways - he is a mean bugger. He chases down every fish in the tank. I'm guessing he might be responsible for that other one missing its eye.
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Old 09-18-2014, 07:14 PM   #10
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Does look much better from what I can see. Sounds like a return. How's the one with no eye doing?
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Old 09-18-2014, 08:18 PM   #11
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Still no eye, but other than that normal. He's been eating too


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Old 09-19-2014, 04:34 AM   #12
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Good news he is eating. Fingers crossed
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