Help needed on identifying skin disease

[Linas]

Guys, please help me identifying and picking the right medications and treatment for one of my Motoros.
3-4 days ago, after regular aquarium cleaning on my female's head I noticed a black spot. At that moment she started burying herself. 2 days later the black spot became greyish, and white stuff started to cover the spot. Since the beginning of the problem the stingray is hiding(burying) a lot, but still eating very well, as if nothing happened. My tank is 316 gal., temp 27 C, water param. 0/0/40, constant drip system. Fishes: 40cm Silver Arowana, 7 Silver dollars, 2 Dats and two 25 cm Motoros.
What do you guys think, is this a fungus, some mechanical damage, bacterial infection? I've never seen that kind of stuff on a fish.
Here are some photos.

 

[scott s]

Do you have an uncovered heater? Looks like heater burn. Clean water, make sure no fish are picking at it.

 

[Linas]

No, all my heaters are protected. Would any salt help?

 

[johno27]

I would suspect a tank mate I would isolate her with a divider and see if she stops burrying and gets better. Salt couldn't hurt but thats up to you

 

[Linas]

I suspect I could've hurt her with a large piece of driftwood, while cleaning the tank. Maybe I didn't notice her buried during the tank cleaning.
Could that be a cause? None of the tank mates are picking on her. How does a fungus look like?

 

[johno27]

I would still divide her off so she can heal up. The risk of not dividing her far out weighs how easy it would be to throw some eggcrate and suction cups in the tank for a week or two.

If it comes back when you remove the divider you will know for sure

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[Linas]

Hello,
I am wondering how long this white area on my stingray will last. I think almost two months passed since the beginning, but it doesn't show any signs of healing or maybe turning back to normal skin colour. The ray feels perfect, active, eating well.

 

[JohnG]

Looks like it has gotten much worse since your original post. I don't think that's damage from another tankmate, looks more like a fungus or bacteria. Since its getting worse I would treat the tank with Binox at this point.

 

[Ade]

Looks nasty !

I hope it clears up quick. At least it still eating.


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