Fish Suddenly Dying

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Kelly-Jo

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Hey, in the last few days or so I've had several problems. Firstly, on Thursday night my bronze cory died from severe fin rot. I have been medicating for at least 2-3 weeks with melafix to try to solve this problem; but to no avail. Since Thursday, I have noticed that my other 3 bronze corys are developing fin rot too. Overnight, two of them have got drastically worse to the point where one of them almost has no tail anymore. I went to medicate them again today and on opening the hood of the tank, I found a black-skirt tetra dead against the filter. :blink: I'm completely baffled as to why fish are suddenly dying. The tetra was completely fine from appearance literally 2 hours beforehand and was eating and swimming.
I had my water tested recently and it was spot on, the filtration has not been a problem and although the stocking isn't great (product of not reading up properly when I first got the tank) there are no major problems with aggression beyond the odd bit of chasing. The only thing I've done differently is add the melafix, could this be doing more harm than good?

Any ideas as to why my fish are getting fin rot/dying? :look:
 
Hey, in the last few days or so I've had several problems. Firstly, on Thursday night my bronze cory died from severe fin rot. I have been medicating for at least 2-3 weeks with melafix to try to solve this problem; but to no avail. Since Thursday, I have noticed that my other 3 bronze corys are developing fin rot too. Overnight, two of them have got drastically worse to the point where one of them almost has no tail anymore. I went to medicate them again today and on opening the hood of the tank, I found a black-skirt tetra dead against the filter. :blink: I'm completely baffled as to why fish are suddenly dying. The tetra was completely fine from appearance literally 2 hours beforehand and was eating and swimming.
I had my water tested recently and it was spot on, the filtration has not been a problem and although the stocking isn't great (product of not reading up properly when I first got the tank) there are no major problems with aggression beyond the odd bit of chasing. The only thing I've done differently is add the melafix, could this be doing more harm than good?

Any ideas as to why my fish are getting fin rot/dying? :look:
hello kelly,
have your fish been suffering from another illness in the past few month or so?
or anything you have added or anything that may be stressing the fish at all?

water conditions are not allways the main causes of fin rot.
any sort of stress is.
this makes them suceptable to bacteria in the water,even if your water conditions are fine

keep up with your mediacation
and make sure there is a good gravel clean too
 
You should be doing huge water changes every day. If you just keep adding the Melafix and not changing the water, the problem is still in the tank. Fin rot is mostly due to poor water conditions, which stress the fish.

Get yourself a professional liquid test kit like the API Master Test Kit. There's not an LFS on the planet I'd trust to do it ... sorry! I was at my favorite LFS yesterday, and the sales clerk tried to charge me twice for my items. Yikes. So, the more you can do yourself the more you can trust the results.

Good luck, and please keep us posted!
 
Hi Kelly, I would suggest changing the medication. Melafix is only good at handling very mild cases of bacterial diseases. And I definitely wouldn't advise using it for 3 weeks as it can become a bit of an irritant to some fish.

I would do a good water change - at least 50% - and use something like Myxazin or other similar good anti-bac that treats severe fin rot cases. Also, reduce your feeding slightly until symptoms clear up.

Can I just ask what size tank you have and what you are currently stocked with? Also, what are you feeding them and how often?

Regards, Athena
 

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