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Sick Cory

Badmans Tropical Fish Message Center: Fish diseases : Sick Cory
  

marie6749

Sunday, January 13, 2002 - 12:16 am
Well I am at my wits end here. I have one very sick peppered Cory cat. She was in a 55 gal tank. (she is now in a 10 gal QT tank) Tankmates (in the 55 gal) were 6 Rasboras, 6 neon Tetras, 6 Zebra Danios, 9 other Cories (4 of them are babies) and one ramshorn snail. Temp=77, PH=6.6, Nitrate=2.5 ppm , Ammonia and Nitrite are both 0. I do a 20% water change every other week. There have been no new additions to this tank since October. No one else shows any signs of sickness. About 2 weeks ago I took some gravel out of my tank to give to my mom to seed her new tank. There was some debris floating around from this, but it settled in an hour or so. Last Friday, I noticed this cories scales looked a little roughed up around her top fin. Then Saturday morning, it looked like little tiny blisters on her. I put her in the QT tank to watch her. I looked all over the net..starting here of course..to see if I could find anything that resembled what I was seeing. I can't find anything that sounds like what she has. I treated her with Kanacyn every other day for 5 days. The last day was Wednesday. These blisters just keep getting bigger and bigger. There are at least 20 of them. Most are on the top, there are none on her sides and there are a few on her belly. I have a digital camera and if anyone is willing to take a look I could email a picture to you. I feel awful for her, but I don't want to keep dumping meds in there if I don't know what is wrong with her. Any and all advice will be appreciated.

  

Kick

Sunday, January 13, 2002 - 10:59 am
marie, send me a pic. Let me take a look. In the meantime, I will look over my books for "blisters" to see if I can find anything pertinent.

  

marie6749

Sunday, January 13, 2002 - 12:12 pm
Thanks kick, I sent you a pic just now.

  

Kick

Sunday, January 13, 2002 - 01:43 pm
I sent you an email back. Strange.....indeed. Well, the investigator is on her way to the LPS plus while my husband drives, I will check out my illness and health book along the way. If we can find out what this is, why it happened and if there is a cure, we definitely need to send this to badman for posting. Wish me luck!!!

  

marie6749

Sunday, January 13, 2002 - 06:23 pm
GOOD LUCK and THANK YOU!! The cory is still in QT. Acts normally and is still eating well. None of the fish in the 55 gal show any signs of this strange malady thank goodness. I am watching them all very closely. Maybe when I took some gravel out to give to my mom, the cory ate some of the gunk that was released into the water column and that's what caused this. That is the only thing "unusual" that I have done to this tank.

  

Kick

Sunday, January 13, 2002 - 06:24 pm
marie, are you there? Email me if you are. I have information for you. If I don't hear from you in about 20 minutes, I will post back here.

  

jeff s

Sunday, January 13, 2002 - 07:27 pm
hey can I get in on this?..how about sending me a pic to see if I can be of help..and marie please describle what these blisters look like are the jelly like?..white,hard, black or what?

  

marie

Sunday, January 13, 2002 - 08:36 pm
Sure Jeff I will email you when I get home. At Mom's right now. They look just like a blister would on a human, except with Kick's help, I have discovered they are full of air instead of fluid. I think Kick has solved the mystery. Gas Bubble diease-I've heard it called "the Bends" when divers surface too quick and their body can't equalize the pressure. Here's what happened. In my first post I said that I had taken some gravel out for my mom. What I failed to mention was the most important part (of course). I panicked because of all the crud. So after it settled, I did a much bigger water change than usual 30-35%. Kick thinks (and I agree) that the change in water pressure has caused these "blisters". I will send you the pic though and see what you think. We haven't decided on treatment yet.

  

Kick

Monday, January 14, 2002 - 09:13 am
After making this "project of the day", we have investigated and hopefully found a solution to the problem. After thoroughly checking several books, talking with my fav LPS gal pal and discussing in depth what transpired with this fish, we have found it is, indeed, gas bubble disease. I asked marie to pop one of the bubbles and nothing was there but air. This further confirmed our diagnosis. But none of the books helped much with treatment. We worked together searching the net and discovered the possible reason it happened and hopefully a fix.

We feel it was caused by her removing a larger portion of water than normal. Since the cory is a bottom dweller, the nitrogen saturation from the new water was too high, therefore causing gas inside the fish which was released through his body. One webpage described how this can happen in the winter months of the year because the nitrogen saturation in the water is higher during this time. This can also be caused by adding cold water to the tank and allowing it to heat up too fast, not allowing the nitrogen gas to be released. I was a bit puzzled because marie does have a good filter and bubble wand for her tank, which would agitate the , but apparently it was not working fast enough to release the nitrogen gas.

The fix: Move the tank out of any direct sunlight, keep the lights to the tank off and agitate the water with a bubblestone or stirring. Since this little guy has these "actual" blisters on his body, I suggested a mild dose of aquarium salt to soothe the areas plus the salt also agitates the scales which will produce a heavier slime coat. Also since marie popped one of the bubbles as I asked, we are bit worried about infection. She had already used Kanamycin upon putting him in Q tank with no carbon filter, so we thought that for now, we would not use any more antibiotic and just wait and see from here.

I am planning on writing an article concerning this malady and along with the picture that marie sent, will have badman post it to the site. I think this information could help other fishkeepers if this strange thing should happen to one of their fish. But this mystery is solved and now we will wait to see the outcome. Hopefully, we can save the little guy!

  

joycedonley

Monday, January 14, 2002 - 12:18 pm
Kick great investigation and please do get the article up as I have never heard of this malady! Why the dark tank??

  

jeff s

Monday, January 14, 2002 - 01:27 pm
joyce after discussing this treatment with both kick and marie(the pics really helped!)we agreed with the treatment and diagnosis..reducing light is alway a good stress reducer for any sick fish and it is usually further indicated with those of us who have planted tanks or lots of algea to slow down the gas production...

  

Sierra

Monday, January 14, 2002 - 05:31 pm
Good luck Marie, I hope your corie gets better

  

joycedonely

Monday, January 14, 2002 - 05:54 pm
Thanks for the postscript Jeff. Hopefully I will never see that particular problem. Good detective work! Let us know how it turns out Marie and good luck.

  

marie

Monday, January 14, 2002 - 05:56 pm
Thanks Sierra. I added the aquarium salt and airstone last night, and have left the lights off. We will go from there. Will keep you all posted!

  

Nancy

Monday, January 14, 2002 - 06:36 pm
Hey you guys - I keep hearing conflicting reports.
Some say corys hate salt, others say they don't.
Marie, I see you have added some. How much? Some of my fish would like some salt in their tank, but I haven't done it because of my cories.
What is the correct answer? Thanks.

  

Nancy

Monday, January 14, 2002 - 06:39 pm
P.S. Marie, I hope your little cory gets better. I have three and I know how much personality these little guys have. Good luck.

  

marie

Monday, January 14, 2002 - 06:56 pm
Well Nancy, I really don't know the correct answer, but I can tell you how much salt I added-I only put one and a half teaspoons of salt in a 10 gallon tank.

  

Nancy

Monday, January 14, 2002 - 07:31 pm
Marie, was this table salt or aquarium salt? Thanks.

  

jeff s

Monday, January 14, 2002 - 07:34 pm
marie..firstly yes corys are sensitive to salt..and I hope kick didn't mean to put salt in the QR tank..the reason we wanted salt into the main tank is this: the higher the salinity the less gas water can hold, because disolved salts take up room that the gas could be using..this was to de-gas your tank..not treat the fish

  

marie

Tuesday, January 15, 2002 - 10:16 pm
Nancy, it is aquarium salt.

  

Kick

Wednesday, January 16, 2002 - 10:15 am
To finish up this post and explain to Nancy and Jeff what we did and why, I will update.

Yes, we did add the "aquarium" salt directly to the Q tank. And yes, cories are sensitive to salt, but our dosage was very small....1 1/2 teaspoons to l0 gallons of water. The reasoning behind this is that salt has the effect of agitating the scales which produces more slime coat which in turn is the protective covering for the fish. It has good healing powers to hopefully prevent bacteria from attacking the damaged areas of his skin. It also kills any parasites that might try to invade the little guy while he is trying to get better. And it adds electroytes to the water allowing him to remain hydrated and to balance things out. Plus what Jeff spoke of above.

I talked with marie last night, and the fish's activity appears to be unchanged. He is still eating and active, however, the blisters appear to be getting a little larger. Upon investigating, I found that the blisters may become worse before getting better. This is partially due to the air still escaping from his body into the blisters, but that recovery is still possible. It will just be a long and slow progress. The addition of the extra aeration is our treatment to get the air supply "balanced" in the Q tank, and hopefully in the next couple of days, we will start seeing some improvement.

  

Nancy

Wednesday, January 16, 2002 - 12:11 pm
Kick, so then is it an okay idea to add 1 1/2 teaspoons of salt to each 10 gallons to an aquarium with cories in it? Or is this really only done during illness?
I have some gobies and rainbows that like salt and so this is why I was wondering. I don't have to, but if the cories don't mind that amount then I think I would like to. Thanks

  

jeff s

Wednesday, January 16, 2002 - 02:57 pm
nancy..well this certainly has proven to be an interesting post..firsty corys are belly breathers they like to gulp air extracting O2 from airbubles in there intestinal track..hence why just her cory got overdosed on gases..secondly regarding the salt issue..well the truth is that is debatable..some of us agree the they are sensitive to salt yet some say maybe just a bit more than fishes with scales..I do know some keep corys quite happily in tanks with livebears who need it...so well if you want to add salt maybe just half a normal dose would be fine..or we will start a huge argument/controvery here yet.

  

Sierra

Saturday, January 19, 2002 - 06:16 pm
Actually I'm starting a live-bearer tank and I will be using about one teaspoon of salt per gallon. I plan on having swordtails, mollies, platies (all ladies 'cause I don't want them breeding!), bumblebee gobies (hopefully) and a blue gourami (for some blue colour). I was thinking some bronze cories would be nice to have and would clean up any fallen flake food but I was put off the idea because lots of people said they wouldn't like salt. But maybe I will try it now. I will stock the tank first and then start adding salt gradually to get the fish used to it (they were probably all kept in fresh water at the LFS!) So maybe the cories will be OK if they gradually get used to the salt. And is it OK to have the gourami in salted water - I use 1tspn/gal. with my bettas and paradise fish (related) so I figured the gourami would be OK too?

  

joycedonley

Saturday, January 19, 2002 - 06:57 pm
Kick can let you know on the salt as I think she uses it in all her tanks. I'm pretty sure she sticks with the half dose on the corys.

  

Kick

Sunday, January 20, 2002 - 12:07 am
Most fish are okay with salt, but some require it and others are a little sensitive to it. If you want to keep cories with the livebearers, I would drop the mollies as they require larger doses of salt (almost to a brackish degree) and the cories probably will not do well at all with this much salt. In my tanks where I know the fish are rather senstive to salt, ie catfish and loaches, I use the salt only at half strengh. The usual is l tablespoon to 5 gallons of water, and with these tanks of senstive fish, I usually use 1 level "teaspoon" per 5 gallons, just enough to keep ich and parasites away and to add the electroylytes to the water for the fish's health. If you feel you want mollies that require at least 1 tablespoon or more to 5 gallons, then I suggest you leave the cories out. I would assume that salt will not hurt the gouramis, as I have had them before in salted water, as above, with no problems.

  

Kick

Sunday, January 20, 2002 - 12:12 am
Now back to the topic of this thread. Since I did not see that marie had written, I will tell you that the outcome of our treatment was not favorable. The little guy died. She examined him closely after death to try to be sure the cause was not something other than the nitrogen gas we first thought it was. I don't know whether we are sure of that now or not. But she can post here if she (we) find that these mysterious blisters were caused from something else.

Can we have a moment of silence please for this little fish that fought so hard to survive.

  

Sierra

Sunday, January 20, 2002 - 12:55 am
Thanx for the advice, Kick and Joyce. I am so sorry for your loss, Marie

  

marie

Sunday, January 20, 2002 - 11:43 am
Thanks everyone for your kind words and I especially want to thank you Kick for all the time and effort you put into trying to save this little guy. In examining the fish, I didn't really find anything that would point to something else being the problem. I will post again if we find out anything different.

  

joycedonley

Sunday, January 20, 2002 - 12:17 pm
Sorry your fish didn't make it. You put all you could in to trying to save him.

  

Adam

Tuesday, January 22, 2002 - 12:01 am
I think it is kinda cool that so many people from different places in the country got together to help 1 little fish. I think it is wonderful because so many aquarium owners have to try to deal with these things all by themselves and it can get pretty overwhelming. And Marie, i am sorry for you lose.

 

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