Please Help! Sick Fish!

I have a dalmation molly that I have had for just over a week. Today I noticed he has some missing scales or some type of ulcer or cut right behind his head. It is all pink and raw looking. One of my fish in another tank has just died from swim bladder disease, so I have been treating all fish with Mardel since my older ones (not the new molly) had been exposed to that one. I treated them all 2 days ago and today. Today I moved the sick molly to an isolation tank to be safe, and I also did about a 30% water change in both tanks. He doesn't seem to be in pain, he is swimming and eating well and is as interactive as ever. I just checked on him and noticed some pink tissue like stuff floating in the water, I have no idea what it is but the wound does not appear to be leaking anything. It doesn't appear to be open, just like exposed flesh. There is no way that it could be an injury from another fish as all of my fish are smaller then him and extremely gentle. I have several platys and cherry barbs and have never noticed any fighting or nipping. Does this sound like ulcer disease? Am I following the right treatment course? Thanks for any and all advice!

Marcie said:

I have a dalmation molly that I have had for just over a week. Today I noticed he has some missing scales or some type of ulcer or cut right behind his head. It is all pink and raw looking. One of my fish in another tank has just died from swim bladder disease, so I have been treating all fish with Mardel since my older ones (not the new molly) had been exposed to that one. I treated them all 2 days ago and today. Today I moved the sick molly to an isolation tank to be safe, and I also did about a 30% water change in both tanks. He doesn't seem to be in pain, he is swimming and eating well and is as interactive as ever. I just checked on him and noticed some pink tissue like stuff floating in the water, I have no idea what it is but the wound does not appear to be leaking anything. It doesn't appear to be open, just like exposed flesh. There is no way that it could be an injury from another fish as all of my fish are smaller then him and extremely gentle. I have several platys and cherry barbs and have never noticed any fighting or nipping. Does this sound like ulcer disease? Am I following the right treatment course? Thanks for any and all advice!

Click to expand...

OK I took a pic, unfortunately the camera flash was very stressful for the fish so this is the best I could get as the fish was swimming rapidly.

Marcie said:

Marcie said:

I have a dalmation molly that I have had for just over a week. Today I noticed he has some missing scales or some type of ulcer or cut right behind his head. It is all pink and raw looking. One of my fish in another tank has just died from swim bladder disease, so I have been treating all fish with Mardel since my older ones (not the new molly) had been exposed to that one. I treated them all 2 days ago and today. Today I moved the sick molly to an isolation tank to be safe, and I also did about a 30% water change in both tanks. He doesn't seem to be in pain, he is swimming and eating well and is as interactive as ever. I just checked on him and noticed some pink tissue like stuff floating in the water, I have no idea what it is but the wound does not appear to be leaking anything. It doesn't appear to be open, just like exposed flesh. There is no way that it could be an injury from another fish as all of my fish are smaller then him and extremely gentle. I have several platys and cherry barbs and have never noticed any fighting or nipping. Does this sound like ulcer disease? Am I following the right treatment course? Thanks for any and all advice!

Click to expand...

OK I took a pic, unfortunately the camera flash was very stressful for the fish so this is the best I could get as the fish was swimming rapidly.

Click to expand...

Request Help

Tank size: 10 gal
pH: 7.2
ammonia: ?
nitrite: 0 ppm
nitrate: 20 ppm
kH: alkalinity is 100 ppm
gH: Hardness is 120 ppm
tank temp: 73

Fish Symptoms (include full description including lesion, color, location, fish behavior): Fish seems to be acting fine but has a pinkish lesion on his head. The edges of the sore are clean, not whitish. See original post above. All other fish appear to be fine, and the sick fish has been isolated.

Volume and Frequency of water changes: 25% every 2 weeks

Chemical Additives or Media in your tank: just water conditioner upon water changes, a little ph+ but this was 2 weeks ago before new fish were added (ph was 6.4 before and platy was sickly, after ph+ platy died from swim bladder disease).

Tank inhabitants: 1 platy, 2 cherry barbs, 1 molly

Recent additions to your tank (living or decoration): platy, molly, and 1 cherry barb are 1 week old

Exposure to chemicals: treatment with Mardel today and 2 days ago

Digital photo (include if possible): included above

Marcie said:

Marcie said:

Marcie said:

I have a dalmation molly that I have had for just over a week. Today I noticed he has some missing scales or some type of ulcer or cut right behind his head. It is all pink and raw looking. One of my fish in another tank has just died from swim bladder disease, so I have been treating all fish with Mardel since my older ones (not the new molly) had been exposed to that one. I treated them all 2 days ago and today. Today I moved the sick molly to an isolation tank to be safe, and I also did about a 30% water change in both tanks. He doesn't seem to be in pain, he is swimming and eating well and is as interactive as ever. I just checked on him and noticed some pink tissue like stuff floating in the water, I have no idea what it is but the wound does not appear to be leaking anything. It doesn't appear to be open, just like exposed flesh. There is no way that it could be an injury from another fish as all of my fish are smaller then him and extremely gentle. I have several platys and cherry barbs and have never noticed any fighting or nipping. Does this sound like ulcer disease? Am I following the right treatment course? Thanks for any and all advice!

Click to expand...

OK I took a pic, unfortunately the camera flash was very stressful for the fish so this is the best I could get as the fish was swimming rapidly.

Click to expand...

Request Help

Tank size: 10 gal
pH: 7.2
ammonia: ?
nitrite: 0 ppm
nitrate: 20 ppm
kH: alkalinity is 100 ppm
gH: Hardness is 120 ppm
tank temp: 73

Fish Symptoms (include full description including lesion, color, location, fish behavior): Fish seems to be acting fine but has a pinkish lesion on his head. The edges of the sore are clean, not whitish. See original post above. All other fish appear to be fine, and the sick fish has been isolated.

Volume and Frequency of water changes: 25% every 2 weeks

Chemical Additives or Media in your tank: just water conditioner upon water changes, a little ph+ but this was 2 weeks ago before new fish were added (ph was 6.4 before and platy was sickly, after ph+ platy died from swim bladder disease).

Tank inhabitants: 1 platy, 2 cherry barbs, 1 molly

Recent additions to your tank (living or decoration): platy, molly, and 1 cherry barb are 1 week old

Exposure to chemicals: treatment with Mardel today and 2 days ago

Digital photo (include if possible): included above

Click to expand...

oh, and the tank was set up 3 weeks ago because my original tank sprung a leak. My friend gave me the tank and I used her filter, what was left of my tank water, the petrified wood, and 2 pieces of drift wood, as well as japanese moss ball and black rocks from the original tank so I don't believe cycling should be an issue.

Ulcers are pink or red with a circling of white dead tissue around the edges.
So you have added a bacterial med.