Sick fish? - The Planted Tank Forum
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post #1 of 19 (permalink) Old 08-27-2019, 06:35 PM Thread Starter
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Sick fish?

Hello everyone! I've noticed some sort of fungus on some of my neon tetras and need some help identifying what it could be. Please and thank you!
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post #2 of 19 (permalink) Old 08-27-2019, 06:41 PM
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Hello everyone! I've noticed some sort of fungus on some of my neon tetras and need some help identifying what it could be. Please and thank you!
Yes, looks like fungus.


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post #3 of 19 (permalink) Old 08-27-2019, 07:26 PM Thread Starter
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Any ideas what kind it migjt be amd ways to treat it?
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post #4 of 19 (permalink) Old 08-27-2019, 07:33 PM
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Determining how to treat it would require knowing more about your tank.

How long has tank been set up? Is it cycled?
What are water parameters: ammonia, nitrite, nitrate?

What size tank? What occupants and numbers in tank?

When was this fish added to tank?
Any other recent additions to tank?

Is the fish eating? Swimming with group normally?


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post #5 of 19 (permalink) Old 08-27-2019, 07:43 PM Thread Starter
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Tank size is a 40g tall. Nitrates are between 20 and 40, ammonia reads 0 and nitrites are 0. The tank has been running for about 5 months now. I cycled it for 5 weeks prior to adding any fish. There are 10 neons and 10 harlequin raspboras, 4 cherry shrimp with 2 nerite snails.
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post #6 of 19 (permalink) Old 08-27-2019, 07:48 PM
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Where all fish added at once 5 months ago?
Did you lose any fish or add any fish recently-- in last 6 weeks?

Are the fish eating and acting otherwise healthy besides fungus?


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post #7 of 19 (permalink) Old 08-27-2019, 07:53 PM Thread Starter
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Fish were added in groups of 5 at a time, with no casualties. All of the fish are swimming and eating normally.

The fish in the picture I attached has it the worst, some other fish have small amounts of the fungus on their fins.
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post #8 of 19 (permalink) Old 08-27-2019, 08:06 PM
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Okay.

I was attempting to find an environmental stressor that would be working to lower the fish's immunity-- allowing bacteria and fungus to get a hold of fish fins.
Not sure I found it.

Long-term
I would up water changes minimally from what you are doing now- putting yourself at no more than 20ppm nitrates by end of week. Not sure how often you are doing water changes now; but, I would recommend at least 25% weekly for long-term health of fish. Neons are very sensitive to rising organics in water.

Treatment:
For now, because they appear healthy otherwise, I would treat with API's Fungus Cure ( active ingredients are malachite green and acriflavine) or Paraguard ( which is basically the same active ingredients but with the addition of methelyene blue). Make sure that between each dose that you change at least 25% of water. These aquarium medications work at their most efficient the lower the organic load is in water column. The more water you change, the more effective the uptake of medications. This also has the dual benefit of clean water allowing the fish the ability to build own immune system to fight illness.

What are you feeding and how often?


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post #9 of 19 (permalink) Old 08-27-2019, 08:10 PM Thread Starter
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Thanks for the help, Ill make a trip to my lfs and pick up some API. I do water changes once a week, only about 10 to 15%. Currently Im feeding them omega one fish flakes, every other day.
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post #10 of 19 (permalink) Old 08-27-2019, 08:14 PM
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Check those medications for use with inverts - you might need to remove your nerites and cherries before you dose.
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post #11 of 19 (permalink) Old 08-27-2019, 08:17 PM Thread Starter
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Good call, thanks again!
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post #12 of 19 (permalink) Old 08-27-2019, 08:18 PM
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Thanks for the help, Ill make a trip to my lfs and pick up some API. I do water changes once a week, only about 10 to 15%. Currently Im feeding them omega one fish flakes, every other day.
I would feed a small bit of food every day- and a varied diet. I have seen many problems with illness in fish that are only fed a few times weekly. The problem is that many of the fish we get at the LFS are juveniles- actively growing fish, and need to eat smaller meals several times daily the fisrt couple months. After that, they still need to be fed at least once daily until reach maturity. [Remember, these are very small amounts]
Adult fish can go longer, but even adults should get fed more than 3x a week.

If you can, get a frozen food of some type, like Brine shrimp or Daphnia to add to their diet. This will go along way in keeping them healthy.



Just up water changes ( after treatment) to 25% a week -- I think this may be all you need.


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post #13 of 19 (permalink) Old 08-28-2019, 04:05 PM Thread Starter
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I did forget to mention that the tank is dirted. I used miracle gro top soil. Perhaps this could be a cause of it?
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post #14 of 19 (permalink) Old 08-28-2019, 04:46 PM
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I did forget to mention that the tank is dirted. I used miracle gro top soil. Perhaps this could be a cause of it?
Not a direct cause, as in that's almost certainly not where the disease originated. But it could/will cause an increase in dissolved organics, perhaps contributing to why you are seeing 20-40 PPM nitrates. But I would not expect those levels to impact otherwise healthy hardy fish like neons. I'd be inclined to set up a quarantine tank and medicate there rather than in your display tank if at all feasible -for the fish and the ecosystem's sake. I would dimly light this QT tank to keep them as stress free as possible during this time. In my opinion tea tree oils (Pimafix and Melafix) have never cured any fish of any disease and I am stunned they remain on the market. Just mentioning that in case you run across them or a sales associate recommends them.
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Nothing good happens fast in an ecosystem.
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post #15 of 19 (permalink) Old 08-28-2019, 04:49 PM
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in my opinion tea tree oils (pimafix and melafix) have never cured any fish of any disease and i am stunned they remain on the market. Just mentioning that in case you run across them or a sales associate recommends them.
++1
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