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What is wrong with my oscar. Need help.

748 Views 7 Replies 3 Participants Last post by  illbethejudge
My oscar has a strange mark in his head. he got it like 2 days ago out of nowhere.
Water parameters are perfect.

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I am not a Vet, I did Research for you, that is all. My suggestion that you take it to the Vetrenarians is very strong, how ever before you do this, put in seperate tank, RO water, Filtration, correct heat, (all clean, or new)--

It looks like Hole in the Head Disease/ Freshwater Head and Lateral Line Erosion (FHLLE). It mainly effects Discus, Ciclids and Oscars. (It is a very dangerous disease, and you cannot ignore it). Although you say your perameters are perfect, water quality is a major cause, I wonder if your test kit is old or something.
Poor water quality is usually cited as the main cause, but also poor feeding (proper vitamins-- because there is also a vitamin aspect to this). Poor feeding might be the cause. What is your fish eating?
It is caused by parasitic larvae, Hexamita, and a following bacterial invasion.
If left alone, the lesions will eventually appear and then death.

To treat need to move fish to a quarantine tank with perfect water, (this is for any sick fish). It doesn't need to be an aquarium, a clean sturdy plastic container would do (brace container middle if it is big). Do not use charcoal in your filter because it will also filter out any medication. Possibly RO water because you have no time to cycle the tank.

(When the Oscar is in the hospital tank, you may want to thouraghly clean your tank, just for safety sake. This microbe (Hexamita) might be all over it. Hexamita can live in the bio-filter, or in the water of an aquarium. This is why you need to remove your fish and move it to a clean hospital tank, because it is being attacked by a parasite.

Dosage according to package with antibiotic metronidazole to the treatment tank housing the infected fish. Treat if secondary bacterial infections are present, with additional antibiotics such as Maracyn, Kanacyn, or Furan may be needed.

Feed good fresh food. Oscars are primarily carnivores. You might feed things like cut up (grocery store) fish, shrimp. I would steer away from live food because it might have some bugs in its guts.

Reduce all stress in fish. Keep place warm (to specifications for fish), lights low or covered. Treat like a sick animal-- which it is. Oscars are great, they call them the puppies of the sea. I would take it to the vet, if you do have a vet who looks at unusual/exotic animals. Many people have taken their koi and goldfish to the vets.

Once again, I am not a Vet, I am just an interested fish owner. Other people may have opinions on this.
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I am not a Vet, I did Research for you, that is all. My suggestion that you take it to the Vetrenarians is very strong, how ever before you do this, put in seperate tank, RO water, Filtration, correct heat, (all clean, or new)--

It looks like Hole in the Head Disease/ Freshwater Head and Lateral Line Erosion (FHLLE). It mainly effects Discus, Ciclids and Oscars. (It is a very dangerous disease, and you cannot ignore it). Although you say your perameters are perfect, water quality is a major cause, I wonder if your test kit is old or something.
Poor water quality is usually cited as the main cause, but also poor feeding (proper vitamins-- because there is also a vitamin aspect to this). Poor feeding might be the cause. What is your fish eating?
It is caused by parasitic larvae, Hexamita, and a following bacterial invasion.
If left alone, the lesions will eventually appear and then death.

To treat need to move fish to a quarantine tank with perfect water, (this is for any sick fish). It doesn't need to be an aquarium, a clean sturdy plastic container would do (brace container middle if it is big). Do not use charcoal in your filter because it will also filter out any medication. Possibly RO water because you have no time to cycle the tank.

(When the Oscar is in the hospital tank, you may want to thouraghly clean your tank, just for safety sake. This microbe (Hexamita) might be all over it. Hexamita can live in the bio-filter, or in the water of an aquarium. This is why you need to remove your fish and move it to a clean hospital tank, because it is being attacked by a parasite.

Dosage according to package with antibiotic metronidazole to the treatment tank housing the infected fish. Treat if secondary bacterial infections are present, with additional antibiotics such as Maracyn, Kanacyn, or Furan may be needed.

Feed good fresh food. Oscars are primarily carnivores. You might feed things like cut up (grocery store) fish, shrimp. I would steer away from live food because it might have some bugs in its guts.

Reduce all stress in fish. Keep place warm (to specifications for fish), lights low or covered. Treat like a sick animal-- which it is. Oscars are great, they call them the puppies of the sea. I would take it to the vet, if you do have a vet who looks at unusual/exotic animals. Many people have taken their koi and goldfish to the vets.

Once again, I am not a Vet, I am just an interested fish owner. Other people may have opinions on this.
thanks for your advice.
I agree, even better is if the vet can do a home visit, He would need to do a scrape and check it under a microscope as there are a host of things that look similar to the naked eye.
Phone a few vets and try to find one with small animal specialisation wich would include fish. took me about 3 tries to find one over here, he even does planted tanks.

In the mean time, I would do regular water changes with water that has been treated for chlorine and sat out overnight to degas and stabilise pH.
You can also add about 1 teaspoon of salt / 10 gal, this is not a medicinal dose (other than when treating for excess nitrates), but it does seem to perk most fish up a bit when they are unwell.
Most of the freshwater pathogens also dislike salt.
I agree, even better is if the vet can do a home visit, He would need to do a scrape and check it under a microscope as there are a host of things that look similar to the naked eye.
Phone a few vets and try to find one with small animal specialisation wich would include fish. took me about 3 tries to find one over here, he even does planted tanks.

In the mean time, I would do regular water changes with water that has been treated for chlorine and sat out overnight to degas and stabilise pH.
You can also add about 1 teaspoon of salt / 10 gal, this is not a medicinal dose (other than when treating for excess nitrates), but it does seem to perk most fish up a bit when they are unwell.
Most of the freshwater pathogens also dislike salt.
I'll try the vet. I rescued this fish around 6 months ago from horrible living conditions. He was in a 40 gallon tank at my friend's house with a filter rated for 20 gallons, he got the fish from his cousin that had him in a 120 gallon but didn't want him anymore. when i got him he was dying of ammonia poisoning. Now he lives in a 90 gallon tank with 2 emperor 400 filters and a healthy diet. i test the water weekly and do 35% weekly water changes as well and once a month i do a 60% water change. if the fish die i am gonna feel like i fail.
It is probably heximita or something similar, but best is to let the vet check a smear of the spot and prescribe the right antibiotics.
I'll try the vet. I rescued this fish around 6 months ago from horrible living conditions. He was in a 40 gallon tank at my friend's house with a filter rated for 20 gallons, he got the fish from his cousin that had him in a 120 gallon but didn't want him anymore. when i got him he was dying of ammonia poisoning. Now he lives in a 90 gallon tank with 2 emperor 400 filters and a healthy diet. i test the water weekly and do 35% weekly water changes as well and once a month i do a 60% water change. if the fish die i am gonna feel like i fail.
This explains the "bad water." It is even possible (I do not know) that he was harboring the parasite since then, or it was brought in on something from that tank. I hope he gets better. I have seen poor oscars, huge ones in a 20 gallon tank. That is crazy. I once saved a cory catfish the way I described, but I used pima fix and it did not have hole in the head.

2 youtube videos on hole in the head disease:

look up "The Fish Doctor"

Hole In The Head Disease (HITH) - Causes and how to treat, Oscar cichlids with HITH

part 1 and part 2
2 youtube videos on hole in the head disease:

look up "The Fish Doctor"

Hole In The Head Disease (HITH) - Causes and how to treat, Oscar cichlids with HITH

part 1 and part 2
would do. thanks.
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