The death of 6 tetras in the past three days.?

Question

I have had 6 tetra's (4 penguins and two neons) die in the past three days. All of my water conditions are good, and the fish do not show any indications of ich, fungus, worms etc.

The only noticeable issue is that the black line of the penguins seems to be less solid than usual, and the fish seem a little less active than usual, right before their death.

Other factors about my tank:

29 gallon with live plants

Population:
1 Plecostamus
2 corydorus
3 neons tetra(formerly 5)
5 rummy-nosed tetre
1 penguin tetra (formerly 5)
3 endlers livebearers
4 whiteclouds

...also recently a few snails have appeared in my tank, probably came with a new plant. Also there has recently been small amounts of black algae grrowing on one type of my plants.



Does anyone have any idea what could be going on?

I have neutral ph
o ppm of nitrites,
no ammonia, or phosphates in my water.

I have an eclipse filter.

I was thinking about adding some salt.

This tank is well established, no new fish recently, temperature is 80 degrees.

oh and also, I did a water change 1 week ago, but I alway use conditioner.

Answer 1

My first thought is also nitrate levels but if that checks out then I would first question the possibility of neon tetra disease, but that usually affects the color on the neon's as well. Watch closely for color loss around the dorsal fin on any of your fish but especially on the neon's and the remaining penguin. Any lose of color in this area could be an indication of neon tetra disease. If that is the case, be sure not to allow the fish to die in the tank as that is the only known method of transmission, from a dead fish that has it to a live fish.

Without more signs or symptoms it's really a guessing game at this point. Hopefully the problem will clear up or if not then at least enough symptoms will appear to make a good diagnosis.

Sorry I can't help more.

MM

Answer 2

When and where did you get these fish and did you add them all at the same time? Unfortunately there are places like walmart where the fish are so stressed out a transfer to a newer tank goes beyond help. Also how did you float the fish when putting them into the tank?

Some of your fish are cold water and some are warm water. What is the temperature you are keeping your tank at now? Since you lost some fish one day and some fish a day later there could be a few things going on in the tank. Your PH is 7 and no other fish seems to be affected.

It is possiable your fish were overly stressed from the transfer.

Answer 3

Since you have added what the water parameters are I am going to have to change my answer.

If those are your water parameters and they are up-to-date(i.e. not from a month ago) i would say your water quality is A-ok and that would not be an issue with the fish death. You must have some sort of internal parasite, bacteria or disease that is killing these fish. I would try a good all around antibiotic medication for your fish. Try using some anti-fungal/bacteria meds from a fish store and see if it helps.

It's really hard to diagnose and treat whatever it is that is killing your fish..There aren't any outward "signs" letting you know the symptoms.
Other than that I can't help anymore. Sorry wish I could be of more use to ya.

Answer 4

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Answer 5

Generally tetras are the 1s fish to die of bad water conditions. Given your nitrates, and pH this doesn't seem to be the case. That leave disease. You haven't tell us hoe they died. Any strange colors, ragged fins, spots, fuz, or swelling? The loss of the line brings to mind "neon tetra disease", but one expects to see cysts, and curved spines. In which case you are basically screwed. You can isolate effected fish, and keep water conditions good, but that is it. There is also false NTD which is bacterial so you could try a course of broad spectrum antibiotics like trisulfa.

Answer 6

I would put all those fish in my Oscar tank and the problem would be solved in minutes, and my Oscar would be full. :)

Answer 7

First, I would check nitrate levels, but you say all water conditions are fine.

therefore, it must be bacterial or internal parasites. just because you dont see it, doesnt mean its not there. something is obviously wrong if fish are dying like that.

Treat your tank.

.

Answer 8

their is too many different kind of fishes in their ..try to just stick with one kind of fish ....