Sick danio with red belly? - The Planted Tank Forum
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post #1 of 4 (permalink) Old 04-12-2019, 02:38 PM Thread Starter
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Sick danio with red belly?

So I’ve been scouring the internet for answers on this. I recently added two young long fin zebra danios to my crew of 7. One died after a few days but the other was thriving.

I assumed the other was female as the belly was starting to get large as the fish grew — this happened with another young blue danio I got a couple weeks prior and I figured it was a she and was just going through her final “puberty” stage. Fast forward to this morning and I can’t see her at feeding time.

Then I find her wandering aimlessly around the bottom of the tank. Coloring is faded, her right fin seems to be paralyzed, belly is almost concave and extremely red. She won’t eat. I was already running late for work so I put her in a 2gal jar that I filled 1/3 with fresh water and the rest of the way with tank water, and added 1/4 teaspoon of aquarium salt.

I didn’t have time to check the parameters but I did a 15% wc on Monday as always and Ph was 7.6, nitrite and ammonia were 0 and nitrate was 10. I don’t always check kh/gh but will when I get home.

I have a picture of her. Her belly is much redder in real life. I plan to stop by the lfs after work to get some antibiotic or something but was wondering if anyone had any ideas?

Her scales are NOT pineconing, she doesn’t have ich spots or anything ....was thinking of giving her minced garlic as that cured ich in my old tank and stimulated appetite but I’m just beside myself thinking she will suffer all day while I’m at work!
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post #2 of 4 (permalink) Old 04-12-2019, 03:18 PM
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Did you do any sort of acclimation when adding the new fish to the tank?

Sometimes you can get away with just putting them right in, but I would always advise allowing the new fish to slowly get acclimated to the new water conditions when adding. Unless you are testing the water at the pet store (which some people will actually do), it's impossible to know if the water that they are in there is anything close to what is in your tank at home.

My technique is to put the new fish in a tupperware w/ some of the water from the pet store, then add just a little of the water from the tank about every 10 minutes over the course of an hour or two until it becomes about a 25/75 mix (25% pet store water/75% tank water). Then, I net them and add them to the tank. This cuts down on the intitial shock that the fish go through in being introduced to a new environment with different water parameters. The other benefit to doing it that way is that it adds virtually none of the pet store water to the tank, which could have diseases and parasites in it.
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post #3 of 4 (permalink) Old 04-12-2019, 03:38 PM Thread Starter
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I float them for about an hour and then drip acclimate for another three or four usually. I never put the lfs water in my tank and I’ve had her for about a month now. She was totally fine and thriving until this morning 😞
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post #4 of 4 (permalink) Old 04-19-2019, 01:16 PM
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Looks like hemorrhagic septicemia unfortunately! You can try feeding tetracycline asap with her food. Do not put her back in the community for sure.
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