Fish dying 1 x1 no sign of illness
I'm scratching my head is disbelief as my tank dies off. I have a 55 gallon tank established over a year. I've lost 3 fish in two weeks. The strange part is they show no obvious sign of illness. One by one they float next to the heater for a few days then die.
The only sign something is wrong is they breathe heavy and stop eating. So, with that information the first step, check ammonia. But my levels are fine so I'm back at step one. I thought maybe low O2 but then all the fish would be gasping at the top of the tank.
Now, I had a Serpae Tetra die last month in a hospital tank of what seemed like NTD. He turned Gray and resembled something out of a Stephen King movie. It's certainly possible that my tank can be contaminated with whatever killed the Serpae, but then, wouldn't these fish die the same way? There not, their eyes are clear, no obvious cause, they look healthy even in death.
Eheim 2213 filter with spray bar.
- Change filter floss when needed
- Clean ceramic rings when needed
- Change 1/4 of substrate every 3 months (Bio)
Ammonia - 0
NitrIte - 0
Nitrate - 20
PH - 7.6
PH Tap - 7.6
KH - 7
DH - 4
25% change every week
Vacuum with every change
No other chems
6 Black Mollies (All female)
3 Platy (All female)
4 Serpae Tetra
None used since no cause.
I would be gratefulll with any insight some may offer. This has been a sad and confusing few weeks.
BTW, they are not all breathe heavy and dying at the same time. One fish will hide, stop eating and then die. During this process the rest of the tank is very playful and happy. I said 1x1 because it seems like once a fish dies, another one will take its place and hide. Then thy stop eating and die. This happened 3 times. Now another molly is hiding but the rest of the fish look great. I have no clue whats happening.
There is no sign of illness, no signs of parasites....I don't know
same issue, fish dying 1x1 no sign of illness
I am new to this forum, but I am having the same issue right now. All my numbers are good, but my fish are dying 1x1. they are fine one day and dead the next. Not seeing any reason they would be dying. I am worried now for my large angel fish. She usually is on the other side of the tank, but has moved over by the heater and filter and seems to be hiding. Not normal for here. This tank has been established for at least 6 months. I did notice yesterday that the angel fish and another small molly seem to be staying at the top of the tank. Could there be a problem with oxygen? I also have an air stone in the tank. Thanks for any help that someone can steer me in the right direction.
What kind of food are you using? Are they getting a varied diet? and what is your temp?
I was having a similar problem with 2 of my molly and now a platy. I've come to the conclusion that the flake food was bloating and popping their swim bladders. I switched over to primarily granules and wafers with a bonus of brine shrimp and bloodworms, I still have the flakes but now I grind them up and feed only the tiniest amount a couple times a week.
My molly succumbed to it rather quickly but I think I caught my platy fast enough. I have her in a floating breeder box in front of the filter so she can reach the surface with the warmer water and get plenty of O2. She also has better access to food. Today I'm going to put a pea in with her and see if this helps. The first molly looked terribly deflated but i thought it was cause she had fry. When the male bit it, he looked just fine but in hind sight I wasn't looking carefully to see if he looked a little thin. My current platy does look a little slim compared to her tank mates.
Sorry to hear you're having the same issue. I feed them Tetra Flakes and Frozen Bloodworms. Another one on my Mollies died this morning.
At this rate i'm really expecting the whole tank to expire. If so, i'll start over. Very sad.
You said one of your Platy recovered, what was your treatment?
It could be an O2 issue. You might try to lower the water level in the tank, create more splash for increased O2 exchange. What size tank do you have? What are the numbers? Stocking? Filter? Do they show any signs of parasites or fungus?
In my case, the fish show no sign anything is wrong. I posted my numbers. One day a single fish will hide and die. Very strange. I can't med the fish without knowing what i'm treating.
I really don't know if this is it. but have you noticed any strange odors from the tank?
Just wandering because I'm having an issue with the 'bad' bacteria producing sulfur in the substrate. Kind of a rotten eggs smell.
Are you sure it's not a dead snail? They stink when they die.
I have so far lost 2 small platys and 2 bloodfins. I have a 55 gal tank. I checked ammonia, nitrite and nitrates, which were all 0. No strange odors coming from the tank. I have 1 angel fish, 2 sm bala sharks, 3 buenos aires, 3 cherry barbs, 2 bloodfins and 3 headlight/taillights. Yesterday my angelfish would not eat and was hanging out at the very top of tank in the corner. I did a 25% change of water, changed filters , added another air stone and added aquarium salt. Today angel seems to be much better and she ate too. I am keeping my fingers crossed that the crisis has passed. Hope you get your issue resolved and do not lose anymore of your fish. I feed them only flakes and have done so for the last six months.
You said all your numbers are 0? In an established tank you should have a Nitrate reading. It's possible you did to much cleaning and your tank is re-cycling. Watch for ammonia spikes.
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