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Old 01-24-2009, 12:15 PM   #21 (permalink)
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Default Re: Common causes for death or illness of fish

Diana, thank you for writing such an informative article backed by scientific study citations.

The linking of MB (mycobacteriosis) to fish stress reminded me of an observation that I have had over the years on neon tetra-only tanks. One day a neon tetra didn't look healthy while the rest were ok. I let that fish remained in the tank until finally s/he gave up, usually weeks or months later. Then another fish became ill within days. But when I immediately moved a sick fish to another tank, a second fish became sick within days while others remained healthy. When I moved that second fish, a third one became sick not long afterward. Unless the sick fish was getting very weak, s/he liked to stay within a group.

I had observed the above phenomenon several times. It could be mere coincidence. But it appeared that something was causing one fish sick at a time. Sometimes I saw neon tetras (typically only two) engaging in a head-to-head fight. A fight could be so nasty that it lasted up to 20 seconds, despite other neon tetras trying unsuccessfully to break up the fight. It looked as if some strong personalities were not willing to back down and therefore decided to fight it out. I wonder whether the one-sick-at-a-time phenomenon was an indication of dominant fish(es) taking it out on an easy target. When that easy target was gone, another one became the target. Being a target stressed the fish and therefore came down with disease. But then it could be someone trying unsuccessfully to dominate the population, engaged in too many fights, and therefore being stressed out.

Another subjective observation, but on fish de-stressing. Sometimes, typically couple hours before the tank light went off at night, all the neon tetras in a tank spontaneously aligned themselves loosely in a procession and leisurely paraded down the length of the tank. Upon reaching one side of the tank, everyone turned around, with the leaders became the followers, and paraded to the other side of the tank. It was as if they were doing some kind of bonding ritual - taking turn to lead and follow. Very soothing to watch. That went on for sometime before the 'parade' broke off.
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Old 01-24-2009, 12:40 PM   #22 (permalink)
 
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Default Re: Common causes for death or illness of fish

What great advice for beginners. I had one of those "duh" moments when I read the keep water temp close to tank temp on water changes. Mine have been close but no cigar. Thanks
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Old 06-07-2009, 04:19 AM   #23 (permalink)
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Default Re: Common causes for death or illness of fish

The last time a fish died in my tank the reason was too much carbon dioxide. I do not remeber exactly how much the Ph dropped and how much ppm CO2 I had in the tank. What was for sure is a group of 12 lemon tetras left this world that day.
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Old 06-09-2009, 03:22 PM   #24 (permalink)
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Default Re: Common causes for death or illness of fish

Sorry to hear that GrandePippo. You're right, it does sometimes happen and if you see the fish gasping at the surface, you know it's time to either turn down the C02 or add an airstone to bring the conditions back to a more comfortable state for them.
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Old 09-01-2010, 08:41 PM   #25 (permalink)
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Default Re: Common causes for death or illness of fish

I would say to quarantine both new fish and any sick fish.
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Old 10-22-2011, 03:38 PM   #26 (permalink)
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Default Blue Ram with white spots on the fins

I just purchased a couple of blue rams from Petco that came with some white spots on the fins. I kept them in the hospital and used treated them with methylene blue, but the spots don't seem to be going away.
I think is not itch, since it is limited to the fins, could still be columnaris, but there are no lesion on the back. They are otherwise doing well, eating and chasing each other. Any suggestions/experience treating this?
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Old 10-22-2011, 05:06 PM   #27 (permalink)
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Default Re: Common causes for death or illness of fish

Quote:
Originally Posted by trenac View Post
Jan, that's a great list... The only thing I can think of at the moment is: Do not impulse buy, do research first before purchasing fish. Make sure you know the fish needs: Environment, feeding, compatibility etc..
This is a great one.. if I see something (fish or plant) that I like at my LFS I take a pic of it with my phone; then I come home and research it to see if it will do well in my tank.
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Old 06-07-2012, 03:24 PM   #28 (permalink)
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Default Re: Common causes for death or illness of fish

Most of my fish, when they have died died of Ick. I have always had either GBR or EBR and they seem prone to it. I always quarantine my new fish first though and if I see an Ick outbreak, I dose my tank and slowly raise the temperature.
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