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post #1 of 5 (permalink) Old 07-27-2020, 07:59 PM Thread Starter
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Disease ID thoughts?

My two nano tanks are getting hit at the same time it seems. Iím assuming it may be related to the same pathogen, but maybe not. Any thoughts based on photos?

Tanks are low tech, species only and have had the inhabitants for 4+ months w no problems, no deaths. Waters parameters stable based on my weekly testing. Only change was the addition of a few new ember tetras a few weeks ago.

Treated the chili tank a week ago with prazipro assuming internal parasites based on general loss of appetite and some fish showing twitchy, erratic swimming. Have loss 3 chilis in the last week. Havenít treated ember tank with anything yet, everyone active and eating normally except dead guy below.

Chili Rasbora #1...super pale, twitchy movement, and parasite hanging from gills? Dead.
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Ember tetra #1...super pale, and grayish patch near dorsal fin. Dead.
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Ember #2...not sure if this guy is sick or not. Acting normal, but very noticeable bump/growth between pec fins.
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post #2 of 5 (permalink) Old 07-27-2020, 08:48 PM
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That white "saddle" in front of the dorsal of the fish that died looks very characteristic of Columnaris. But, you say they are acting like/you visually saw a parasite on the gill. Are you sure it wasnt heavy mucus and not a parasite? Columnaris can also attack the gills-- it is known by its symptoms as "Saddle-back" disease, "Cotton-wool" disease, and "Bacterial Gill" disease. But, there are 4 strains so not all of these symptoms show up in all strains.

Are the fish rubbing on objects, backing up as if trying to escape some irritant, gasping for breath? It could be Gill Flukes. (Gill flukes are not visible to naked eye, however). Which, in that case you will need to treat with the Prazi-pro for 21 days.

I know you said that your parameters were "stable", but- what is your nitrate level?


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post #3 of 5 (permalink) Old 07-28-2020, 12:00 AM Thread Starter
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Chili in first pick has something string like hanging on off the gill area. Not sure if thatís clear enough to see. But none of the others including those that died had something similar, so it may be nothing.

No fish flashing on objects, but chiliís are doing some jerky/twitchy movements.

Nitrites 0 ppm, Nitrates between 0-20 ppm based on testing strips. I dose about 5 ppm per week, with 50% weekly water changes. Tap water Has essentially zero nitrates.
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post #4 of 5 (permalink) Old 07-28-2020, 12:42 AM
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Quote:
Originally Posted by Jason K View Post
Chili in first pick has something string like hanging on off the gill area. Not sure if thatís clear enough to see. But none of the others including those that died had something similar, so it may be nothing.



No fish flashing on objects, but chiliís are doing some jerky/twitchy movements.



Nitrites 0 ppm, Nitrates between 0-20 ppm based on testing strips. I dose about 5 ppm per week, with 50% weekly water changes. Tap water Has essentially zero nitrates.


I think what you were seeing on gills was mucus.
Cannot definitively ID issue, but if you are seeing more deaths I would treat for Columnaris . There is enough here to point in that direction.
If all fish at this point are eating and acting fine, you might ďwait and seeĒ. Making sure to eliminate all possible environmental or nutritional stressors.
Most fish from LFS are juveniles- make sure to feed a high quality food 2 x daily ( small amount) to strengthen immune system. Many fish from LFS are malnourished because of the stress of transport , acclimation into LFS tanks, netting, and acclimation to home tanks.


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post #5 of 5 (permalink) Old 07-28-2020, 12:58 AM Thread Starter
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Thanks for the input, will do some columnaris research.
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