Dark spot on parrot's dorsal

[vincebeach]

I have had a yellow parrot in a 20 gallon long tank with a community of others for about two months now. I just lost one of my red caps two days ago to what appears to have been some sort of bacterial infection, stringy fins and red sores. I am still researching trying to determine exactly what it was. Suddenly this morning the parrot has a small dark looking patch on his dorsal and a little above his mouth. Everyone else looks and acts great.It does not look cottony or stringy, it does not look as though it's on the surface of his fin but it is inside of the clear fin area. It kind of looks like a birth mark.He does not appear to be rubbing that area or acting peculiar in any way. I would think a fungus or bacterial infection would appear to be on the surface, but it is hard to get a good look at it because he won't stay in one spot very long. Every time I take a close look in my tank he thinks it is time to eat and he gets excited and darts around.I do not have a good water test kit yet ( I know I need to make that a priority ),but I plan on taking a sample to my local pet shop in the morning. I normally do one third water changes every week or ten days and just did one two days ago.The last fish introduced was a peacock eel about a week ago. In the tank I have 1 small red cap,1peacock eel,1 coral gourami,2 small red tail sharks,1 glass ( unpainted ),1 four inch goldfish and 1 four inch parrot.Checking online I see diseases with white spots and brown spots but nothing with black spots.Does this sound like anything familiar to anyone ? Thanks for any help. Vince

 

[black angel]

Theres deffinately something bacterial going on and your tank is overcrowded which wont help.
If the black marks look like bruising then it could be septiceamia brought on by poor water quality.
You should do more water changes through the week with gravel vacs.
Do 40% every three days to try and get the water into better shape so your fish can stand a chance in fighting off anything.
I would also remove the goldfish from the tank and get them a tank of their own as the warm water means more waste being produced so making the tanks filter work over time.
Getting the water results will help to see if your water is in good condition or not for any meds if they are needed, but septiceamia can go with lots of regular water changes.

 

[WILDER]

I agree with everything black angel has said, you are well overstocked, desease has now set in which won't be easy to get rid off till you take a full fish out and rehome them, good luck.

 

[Fella]

I can't see 2 red-tailed black sharks being very matey in a 20gallon aquarium either.

 

[WILDER]

Sorry thought they was only one red tailed shark, should never keep them together dont get on with there own kind, plus they need to be in a 40gal tank.

 

[vincebeach]

Thank you everyone for your replies and help. I just finished a VERY THOUROUGH tank cleaning, it took 2 1/2 hours. My friends are worth it though. !! Vacumed the gravel, cleaned the filter, took everything out but the gravel and cleaned it all. Did about a 40 % water change. I also treated the tank with a product by Jungle called Fungus Clear. The active ingregients are :Nitrofurazone, Furazolidone, and Potassium Dicromate. It is supposed to help with Hemoragic Septisemia, Fungus, and tail, fin, or mouth rot. I used to have a few tanks years ago but never really got into the science of them as I want to now, but I have heard of Jungle products for years. Hopefully if they have been around that long their products work. I am going to get another tank as soon as I can and separate some of these guys. I thought that the rule of thumb was one inch of fish per one gallon of tank space. I am pretty close to the maxium at that rate but not over, but I understand now that it's better not to push the limits. The Parrot seems to be doing pretty well, he is active and eating and does not appear to be in any distress. Everyone else is fine too. The sharks that I have ( if they are really sharks, I'll have to check ), have red tails and fins but the rest of them is yellow. They are both about 1 1/2 inches long and they like each other. They are always eating whatever algea there is, they behave more like a type of loach than a shark, and get along with everyone else also. I also just checked my chemical levels, Nitate seems to be under 40 ppm, Nitrite under .5 ppm, the Ph is about 6.9 - 7.1 I am going to get an amonia test kit tomorrow and will post that reading.Thanks again, I'm going to try to get some sleep. Between a full day working and cleaning tonight I need it. Thanks again, Vince