Unexplained Fish Deaths

ThinIce

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Sorry for the long post - I'm hoping however someone will go "Ah ha!"

Grateful for any advice. A couple of week ago I lost my Betta who was about a year and a half in age. He swelled up, eventually lost the ability to swim and pine coned just before death (sounds like dropsy but this didn't occur to me before hand in time to treat). I bought some new duplicate equipment (powered syphon) so as not to tranfer the infection should there be one to my main tank. I haven't lost anymore fish in the Betta's tank. I presumed that mainly the Betta was just old and thus susceptible.

Last weekend one of my rams in the main tank started acting oddly, resting on the sand as if it was painful to swim and swimming in an odd way - head up not moving fins too much as if this hurt. I noted the fish dropping some stringy white poo whilst trying to closely observe it, one of the fins on its side also looked rather tatty, but a proper inspection was impossible as my rams never stop flapping these fins!

I decided to dose the tank with Interpret no 7 Anti Slime and Velvet because several fish had been flicking against objects / the sand and I presumed some sort of parasite whether internal of external. After I had done this I also noticed my plec crapping the same white poo and a female barb hanging closer to the surface than would normally. Thinking back the plec had been a tad lethargic over the previous week.

During the week the Ram moved about less and less, the plec however was more active and was observed eating and crapping poo of the normal colour as of mid week. It looked especially alert reacting to us in its normal way by raising the fin on its back in greeting / warning / whatever.

Today, the Ram lost all ability to swim (i.e it flapped its fins but could not "take off" from the leaf on which is had been resting) and eventually died a little while ago (its body did not pinecone). The plec has been lying on its back (yeah its back) on the sand at the back of the tank for at least part of the day - but has now managed to right itself and stick to the glass with its mouth a small distance from where it was lying, its body is now still partly resting on the sand. The barb remains hanging at the back of the tank - will occasionally shoal with the others and isn't really interested in food. The Ram attempted to chase food right up to yesterday.

I've not been a fish keeper for much more than a year and a half. But having read the description, this does not sound like dropsy. I guess a swim bladder problem would account for the other behaviour, but from what I've read that doesn't happen in multiple fish at once except by chance and does not explain the symptoms of the barb. The dead ram does have tatty fins in places, so that could be an infection that spread into the fish (from what I've read) but again - that wouldn't be catching would it?

Before I did the meds last week I tested the water, Ammonia was 0 as was Nitrite, Nitrate was a little high at 40, so I did a water change. I'm going to do another water change tomorrow and am thinking of stepping this up in order to try and remove anything that is water bourne in the tank.

I have got a spare 10gal tank, but it isn't setup and its seems pointless stressing the plec and barb by moving them - plus the infection has had plenty of time to spread to the other fish so I would have thought to clear whatever it is I'd have to treat the entire main tank.

Problem being I haven't got the faintest Idea what to treat with - and I don't want to try another med as just a guess cause I know this isn't good for the fish either. The Plec is the other half (and my own) favourite fish and I don't want to lose the rest of the tank so any advice is greatly appreciated.
 
With parasites a fish can get bacterial infections on top.
White stringy poo is constipation, internal parasites, to bacteria infection.
Need to look at the flicking and rubbing how many fish are doing the rubbing.
Check gills to see if there red and inflamed, or pale with excess mucas on them.
Any fish lost weight.
Also check the anus of the fish to see if it's looks enlarged or red and inflamed.
What do you feed your fish.
What is your tap nitrate reading.
Adding the velvet med can irratate fish and cause them to flick and rub.
Did you only see the fish flick when you added the med.
 
With parasites a fish can get bacterial infections on top.
White stringy poo is constipation, internal parasites, to bacteria infection.
Need to look at the flicking and rubbing how many fish are doing the rubbing.
Check gills to see if there red and inflamed, or pale with excess mucas on them.
Any fish lost weight.
Also check the anus of the fish to see if it's looks enlarged or red and inflamed.
What do you feed your fish.
What is your tap nitrate reading.
Adding the velvet med can irratate fish and cause them to flick and rub.
Did you only see the fish flick when you added the med.

Need to look at the flicking and rubbing how many fish are doing the rubbing. Adding the velvet med can irratate fish and cause them to flick and rub.
Did you only see the fish flick when you added the med.

A: Most do it on and off, it is not constant however. The barbs are the newest addition and only within the last fortnight have they begun to do it. I haven't treated for this in the past as I've read that some flicking is normal. All the fish I've had have flicked occasionally since I've got them (that said I've never seen the betta, or ottos doing it) - I now realise this may mean I've had infected fish the whole time in both tanks rather than a certain amount being natural itches...

Check gills to see if there red and inflamed, or pale with excess mucas on them.

A: I haven't noticed anything that looks out of the ordinary but will check at lights on

Also check the anus of the fish to see if it's looks enlarged or red and inflamed.

A: Certainly in the case of the Plec, this looked normal as of yesterday

Any fish lost weight.

A: Not visibly

What do you feed your fish.

A: Primarily flake food with freeze dried daphnia / brine shrimp / blood worm as treats

What is your tap nitrate reading.

A: Good point, will post back in morning with answer
 
Flicking is not normal unless a water change has just happened. Flicking is a sign that the fish is irritated, when a fish begins this practice they should be monitored heavily for spots or other signs of disease.
 
Flicking is not normal unless a water change has just happened. Flicking is a sign that the fish is irritated, when a fish begins this practice they should be monitored heavily for spots or other signs of disease.

A: Thanks - I've read conflicting advice on this. Where a fish displays no other symptoms what is the likely cause? With the cories in the ex-Betta tank I feel stumped as they flick and occasionally jump (which again I've read) can be them trying to dislodge something irritating them. I've never seen the ottos in the tank flick but they do occasionally jump.


What is your tap nitrate reading.

A: I've done this test and it is coming out between 20 - 40 :angry: I will add however that I've always found the Nitrate test on the API master kit utterly useless, it is impossible to tell between any of the colour bars above twenty (imo) and I've wondered at its accuracy in the past (its produced odd results before). I'll pick up another test kit this afternoon from another manufacturer. Any recommendations? However zero should be yellow, which it clearly is not. I'll hold off the water changes I was going to do today until then. If this isn't a false reading, should the water company be contacted or is a certain amount of Nitrate within "acceptable" limits?


The plec is alive, mouth stuck to the glass and body resting on sand breathing what I would say is rather faster than normal. It does appear to have some dark lines down its belly (starting underneath the gill area) that were not there before.
 
A pic of the plec can be seen at http://fish.rowancrane.eu/100_1660.JPG

yes - its an old digital camera (sigh). The lines however are just about visible

And this on nitrates from the dwi website

Nitrate Present naturally in all source waters, although higher concentrations can be caused by use of fertilisers. Where necessary, nitrate levels are reduced during water treatment (ion exchange or blending with low nitrate water). See the DWI web site for information on health implications and control measures. 50 mg/l

From the useless colour bars on the API test (or my useless eyes whatever) I'm not sure whether its this high, it could be :blink:
 
A few of my guppy's had unexplained sudden deaths with shredded tails and I was recommended Anti Internal Bacteria treatment.
Symptoms are,
*Swollen Eyes (Popeye)
*Open Sores (Ulcers)
*Abdominal swelling (Dropsy)
*Hollow Abdomen (emaciation)
*Reddening/ Bloodstreaks under the skin surface
*Gills pale and eroded
*Loss of appetite, listlessness and a darkening of colour
*Sudden unexplained deaths.

It does not hurt fishes who don't have it and i've been told to remove all carbon things from the tank before treating.
 
A few of my guppy's had unexplained sudden deaths with shredded tails and I was recommended Anti Internal Bacteria treatment.
Symptoms are,
*Swollen Eyes (Popeye)
*Open Sores (Ulcers)
*Abdominal swelling (Dropsy)
*Hollow Abdomen (emaciation)
*Reddening/ Bloodstreaks under the skin surface
*Gills pale and eroded
*Loss of appetite, listlessness and a darkening of colour
*Sudden unexplained deaths.

It does not hurt fishes who don't have it and i've been told to remove all carbon things from the tank before treating.

Thanks. I've actually already got some of this in the cupboard so may give it a go. Problem is I have to do a water change and wait a few more days before dosing another med (going by the instructions) - I'll still pop out in a bit and get another test kit for the nitrate. Did your fish improve after using it?

Thanks to everyone continuing to read and reply, it is much appreciated.
 
If there no symtoms to go on and the fish are flicking it sounds like skin flukes will get you some info to take a look at.
Skin flukes can cause bacterial infections on top.

http://article.dphnet.com/cat-02/flukes1.shtml

Thanks a lot of that does sound familiar. The 2nd Ram has now developed a milky looking eye. I think my fish are competing to see who can display the most symptoms :grr:

I had the tap water tested by the LFS - this indeed has a Nitrate level of 25ppm (by their test) - one I did myself this morning came out around the same. I take it as long as this is lower than the Nitrate level in the tank, a water change will still be beneficial?

I've bought a bottle of Melafix to be going on with while I read all I can to pick a definitive course of action. I'm coming round to the idea that most of what I'm seeing are secondary symptoms :sick:

Thanks again to all reading.
 

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