![Sad :(](./images/smilies/icon/sad.gif)
Iâ??ve had them for about 3 and a half years.
I noticed yesterday that one looked very, very dark in colour. Almost black. His body colour blended with his stripes.
They are in a 4ft tank, and live with Cardinals, Gold Rams and a 4-inch L47. Internal and external filter and a spray bar.
Ammonia and Nitrite are 0.
Nitrates 10.
Temp 26.
PH 7.2
This tank has a small water change every other day, and a larger one on Sundays. I test my water weekly. I have doubled checked this morning and all is well.
No new fish have been added to the tank. No changes in food and no new wood or plants. They were an inch when I got them, and are now just under 4 inches.
He ate last night, was still swimming with the others and the only sign of anything being wrong was his darker colour. And this morning he was dead.
![Sad :(](./images/smilies/icon/sad.gif)
Any ideas? Thank you.