PLEASE HELP: Oscar Fish Gasping Badly, Lethargic

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dlee4three

Feeder Fish
MFK Member
Sep 27, 2020
10
2
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23
Have you tested your water?
Yes
If yes, what is your ammonia?
4.0ppm when he started having issues, 0ppm now
If yes, what is your nitrite?
0ppm when he had issues, 0 ppm now
If yes, what is your nitrate?
80-160 ppm consistently
If I did not test my water...
  1. ...I recognize that I will likely be asked to do a test, and that water tests are critical for solving freshwater health problems.
Do you do water changes?
Yes
What percentage of water do you change?
21-30%
How frequently do you change your water?
Every month
If I do not change my water...
  1. ...I recognize that I will likely be recommended to do a water change, and water changes are critical for preventing future freshwater health problems.
TLDR: My oscar is struggling to breathe and I don't know why.

My Oscar has been in an established tank for almost 2 and a half years, and has thrived with a variety of tankmates. He is very active and interested in what is going on outside of the tank, constantly coming up to the glass. For the past couple of months, him and a chocolate cichlid were the only fish besides the variety of catfish. i decided to add some convicts from a local fish store, a female and male pair. The female settled in immediately, and was very active and interested just like the oscar. The male however, died within a couple of days, and he looked lethargic the entire time. Shortly after, my chocolate cichlid began to act in the same way, even laying in the same position the convict male would. This freaked me out, and even though the chocolate cichlid was 4x the size of the female convict, I figured she may have been stressing him, so I removed her and placed her in a separate tank. The chocolate cichlid seemed to improve in her absence, and we tried our best to treat him but he passed in the following days. He had signs of ammonia burn, but no other fish in the tank was struggling. The ammonia levels were at 2.0ppm. The nitrates were also high and the pH was low. I was able to fix the ammonia and ph Levels pretty easily, but the nitrate levels were still high. This was about the time my 6 month maintenance schedule had come around, so i replaced the filter media, leaving some of the biomedia to preserve beneficial bacteria. At this point, I was on high alert and worried the convicts had brought an infection into the tank. It was after this process that I noticed my oscar really gasping for air. His mouth would be open 24/7, and his gills were working overdrive to try and get air. He was also laying around the tank and a lot less energetic than usual, but he would still come up to eat and when I would walk up to the tank. I decided to remove him from the 125 and place him in a large bin with an air stone and begin treating for gill flukes and other parasites. I used API general cure, which contains 250mg metronidazole and 75mg praziquantel per pack, dosing 2 packs every 48 hours, and changing 2-% of the water every 3 days. He seemed to improve, but now he is gasping the same way as before. The pump I was using in the quarantine tank was off for an unknown time period, so this could be the cause, but I am afraid the medicine I'm giving him isn't working. I would appreciate any suggestions, the fish stores around me aren't much help at all. I also attached pictures of him and his gills, he also has this weird stutter or cough which you can see in the video.

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If you think that a 21-30% water change ONCE PER MONTH is good husbandry to keep your fish healthy, and that 80-160ppm nitrate is what's going to keep your fish healthy and happy long term, then i'm afraid you are very very sadly mistaken, and your poor fish are telling you as much.

The ammonia your oscar has had to endure has probably caused irreparable damage to its sensitive and complex gill structure, hence the breathing difficulty.

Improve your maintainance schedule and just hope your fish aren't that far gone that they can't make it back to a decent level of health.
 
If you think that a 21-30% water change ONCE PER MONTH is good husbandry to keep your fish healthy, and that 80-160ppm nitrate is what's going to keep your fish healthy and happy long term, then i'm afraid you are very very sadly mistaken, and your poor fish are telling you as much.

The ammonia your oscar has had to endure has probably caused irreparable damage to its sensitive and complex gill structure, hence the breathing difficulty.

Improve your maintainance schedule and just hope your fish aren't that far gone that they can't make it back to a decent level of health.
My fault on the once per month, I actually do water changes at least twice a month but I selected the wrong option. For the nitrate level, it only justr ecently spiekd but I've never had any issues with parameters and I test really frequently. I assure you i change their water frequently, but not too much.
 
I agree with the above. Also what size tank is he in?
If I were you, I would do several daily water changes on the tank of 50% until nitrates are below 20ppm. I would then change my water change schedule to 90%weekly water changes (or more depending on the test results) aiming for 20-30ppm on water change day.
I would check the filter and maybe give it a clean, a dirty filter is a toxic waste factory if not properly maintained.
lastly I would look at ways to increase oxygen by either adding a power head, air bubbler, or lowering the water a couple of inches to increase gas exchange by the filters output
 
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I agree with the above. Also what size tank is he in?
If I were you, I would do several daily water changes on the tank of 50% until nitrates are below 20ppm. I would then change my water change schedule to 90%weekly water changes (or more depending on the test results) aiming for 20-30ppm on water change day.
I would check the filter and maybe give it a clean, a dirty filter is a toxic waste factory if not properly maintained.
lastly I would look at ways to increase oxygen by either adding a power head, air bubbler, or lowering the water a couple of inches to increase gas exchange by the filters output
I appreciate you responding. He's in a 125 gallon tank with a small convict cichlid and an assortment of medium sized catfish. I have a fluval fx6 hooked up to the tank that I just cleaned out a week ago, and replaced a majority of the biomedia, left some to keep some beneficial bacteria alive. I'll definitely take your advice about a water change schedule, and will move him back to his tank in the morning. Come to think of it, after I did a water change and cleaned the filter out last week, the water level was above the output so this may have contributed. Thank you so much!!
 
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The oscar looks like it has Columnaris aka duck lips a contagious bacterial disease.
just looked it up and the description of how it affects the mouth and gill function sounds exactly right, do you recommend any other medicine besides Furan-2 and Kanaplex?
 
The oscar looks like it has Columnaris aka duck lips a contagious bacterial disease.

just looked it up and the description of how it affects the mouth and gill function sounds exactly right, do you recommend any other medicine besides Furan-2 and Kanaplex?

I would hold off on treatment, especially with antibiotics, until you have resolved the issue with your water parameters (ammonia and nitrite). You need to figure out why ammonia and nitrite are so high if they had not been high before.

A couple possibilities regarding the water parameters:

1) The ammonia and nitrite spike could have been caused by the addition of too many fish at once. Fish produce ammonia which nitrifying bacteria in your biomedia convert to nitrite and then nitrate. If you add too many fish at once then you drastically increase the amount of ammonia released in the water. It takes some time for the nitrifying bacteria to increase in size and catch up to the new bioload.

2) You do not have adequate (enough) biofiltration to convert the ammonia into nitrite and then nitrate. Much of the nitrifying bacteria could have died when you cleaned out the filter if the media dried out. If much of the biomedia was replaced then there may not yet be adequate amounts to convert the ammonia to nitrate.

Don't increase pH. This will cause more problems. Also, ammonia is logarithmically more toxic as pH increases.
 
I would hold off on treatment, especially with antibiotics, until you have resolved the issue with your water parameters (ammonia and nitrite). You need to figure out why ammonia and nitrite are so high if they had not been high before.

A couple possibilities regarding the water parameters:

1) The ammonia and nitrite spike could have been caused by the addition of too many fish at once. Fish produce ammonia which nitrifying bacteria in your biomedia convert to nitrite and then nitrate. If you add too many fish at once then you drastically increase the amount of ammonia released in the water. It takes some time for the nitrifying bacteria to increase in size and catch up to the new bioload.

2) You do not have adequate (enough) biofiltration to convert the ammonia into nitrite and then nitrate. Much of the nitrifying bacteria could have died when you cleaned out the filter if the media dried out. If much of the biomedia was replaced then there may not yet be adequate amounts to convert the ammonia to nitrate.

Don't increase pH. This will cause more problems. Also, ammonia is logarithmically more toxic as pH increases.
My ammonia, pH, and nitrite levels have all stabilized since he began to show signs of labored breathing. I would lean towards the 2nd scenario as being the culprit, when I replaced the biomedia I kept the old biomedia in a bucket of aquarium water so I don't believe it dried out. Currently, only my nitrate levels are above normal. I plan to follow what the others said above to try and combat that. As for the medication, I currently have the oscar quarantined, and I'm worried that if I don't treat him soon, and correctly, it may be too late. He has the "lipstick" in his mouth and all the signs that line up with Columnaris, so I'm wondering if you think it's a good idea to treat him while he's quarantined and return him to the tank once the nitrate levels are sterilzied. Im worried since I have been treating it for a parasite when it may have been a bacteria all along.
 
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