Stingray sick , please help

[Malte81]

Hi everybody.
I have a Marbled Motoro male that seems to be sick.
He was always very healthy and he was always the first at the food.
Yesterday everything was totaly normal.
Today at the feeding i noticed that he is not eating anything.
He just laid at the back area of the tank.
I noticed that he pulls up the back area of his disk.
I made a huge water change just to make sure there is nothing wrong with the water.
My other fishes included rays are not showing any signs of problems.
I am a little bit worried at the moment and i am not sure what i can do.

 

[Charney]

beautiful ray. I have 3 marbles at home and two of them do something like this on occasion. It happens to my two right before they have a larger then normal bm, so don't know if it is constipation. I have a couple of ray friends and one other reported this happening with one of his rays.

not sure if this is going on here

water parameters ok? any new fish?

 

[Malte81]

The Water is ok .
I just got a few Chalceus new.
I had some marmor rocks in the tank.
Yesterday i pulled all the marmor out just in case there is something wrong with it.
Now there is only some Wood in the tank.
I made a big water change and added some salt .
I hope he recovers from whatever it is.

 

[Charney]

how is the ray?

 

[Malte81]

He died a few days ago.
I tried to treat him with salt and raised the temperature but it was to late.
It looked like some parts of the disc gets destroyed from something.
The strange thing is that some other rays have with patches on there back.
I was worried about it and the marbled that died
Was the one without any problems.
Than from one day to another it started.
Very strange.
Now I have another marbled and a pearl with these white points on there backs.
I don't know what to do.

 

[Charney]

sure no one is biting on them? are the spots raised?