Heavy fish losses

EweSheep

Flock Mistress
14 Years
Jan 12, 2007
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Land of Lincoln
Not sure what's going on but figured it would be the older fish die offs.

It seems to affect the older female guppies, starting off like "half tail" being white and all the way to their backbone to dorsal fin. I noticed instead of being opaque white on the upper part of body, inside looked white while the bottom looked dark grey. To the first sign to death, usually within 24 to 48 hours. They would get very sluggish, rapid breathing and their tails would get stiff acting like dolphins trying to get on a platform. I removed any dying ones and it is not affecting the youngsters YET and it has been four days. Just the older fishes are having problems.

My barbs, tetras and ground dwellers and snails are not affected by this at all.

The only thing I can say it may have been the new group of neon tetras and very young female guppies that I bought from the store, quarantined them in another tank, no ill effects but the "weakness" of my oldest guppy females didn't seem to weaken as time went on. But once I added the new young fishes, the die off starting to happen.

I have a 55 gal tank so it is way plenty of room for guppies, guessing around ten to 15(leaving two older females, three very young males and the rest of them are just juvies), five tetras (two older, 3 very young), two barbs (very docile), one gold sucker fish, four snails, and two glass eyed fish (probably barbs or tetras).

Right now it is on Melafix, first day yesterday and today, I didn't see any losses but the one older female has a total white color (still has her black lace pattern to it but whatever "clear" turned white )to her tail fin, her abdomen is tuning white (it looked like a white saddled GS dog pattern). Really it is not white on the scales but internally. I thought for sure it was fat underneath the skin but whatever it is, its spreading from topline down to her sides like an infection of some sort while her bottom line is dark grey. That is how prounounced the skin color would be instead of light grey to yellowish grey of normal females. What I would notice on the vivid colored tailed females, it would start off as white circular pattern on the tip of tail, starting on the top.

I have continue with Melafix for seven days or unless someone tells me its the wrong treatment and need something else.

So far in the last three days, I lost five older females some are very pregnant to gave birth prior to this outbreak. I certainly hope it will not attack the younger fishes which seems to be immune to this "disease" and I have two guppy males that I really want to keep. I lost their father about three weeks ago which he accidently got himself stuck in the filter part. he was one of those German blue mosaic color, just absolutely goreous.

What is going on?
 
surfed the net and the guppy males appears to be the Japanese blue pink tailed ones.....I do not know why the pet store called them Germans.......it has the grass patterns. No leopard on body. They do have a black dot on their sides and very faint blue tux pattern on their body. light blue with pink.....just goreous!
 
Took a big ol magnifying glass to see those two female guppies, UGH! Looks like fin rot! This thing is FAST growing! It looked so chewed up.

I know there are plenty of acq. salt, haven't had any issues of ick since then. Tested the water, everything is normal across the board. PH balance is one notch below but still acceptable.

Another round of Melafix!
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I'm sorry you are having so much trouble. I hope at the very least, that your younger fish are able to fight it off. Maybe at some point you will stop having losses and things will settle down in the tank. I hope so.

I wish I could recommend what the best course of treatment would be, but I really don't know. I hope things get better, soon.
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If it is fin rot, a good water change and some antibiotic treatment should get rid of it. The Melafix may work, but if the bacteria have a good hold, it may not. You can get treatments for fin rot and other bacterial diseases at a pet store. Once the treatment cycle is run, do a good water change and run carbon in your filter for a week or so to help clean out the extra meds. If you regularly run carbon, take it out during treatment as it will just pull most of the meds out of the water.

Once you've got it licked, you need to look at what's causing it in the first place or it will just come back. Stress, overfeeding, overcrowding and not enough regular water changes are the usual suspects. It could have ridden in on the new fish and just not shown up even during quarantine until they got into the big tank. Then stress or some other factor caused them to not be able to fight it off.

Good luck! Fin rot is usually pretty easy to treat.
 
We did have a 50% water change about three weeks ago.

I hope it will settle down but looks like I may lose two more females and it would be all the older females now gone. Lets hope the younger ones will fight it off. Melafix said on the bottle it would take care of fin rot and it's a fresh bottle. Maybe it took hold long before the rest of them came down with it before the new fishes were introduced. One female's tail looked so eaten up. UGH! If I want to, I would take those two out and be done with it to prevent any other fishes to brush up along side of them particuarly the males.
 
Well I lost the last two females.

Now it is ONE teenager female and rest of them are juvies.

I hope they stick around a little longer!
 
sounds like ick. Once infected, they are dead fish swimming. There are treatments. Usually they can fight it off, but a sudden water change or water temp. will start ick. I was always told to only change 10% at a time.
 
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I wouldn't necessarily say they will die if they have ick. I had a bout of ick in my ten gallon tank when it was still up and running and I had four platys, three corys, and a betta fish. All of them got through just fine!
 

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