My beautiful and perfectly healthy goldfish darth is currently lilting to the side and acting very lathargic. It started last evening. He is a black moor - is color is also weakening... and I have no idea what is wrong.
It started after a water change.
I'm about to do another change now.
Please help

Sorry to hear that you are having problems. We are going to need you to answer all the questions at the top of the page in order to better know what could be going on.
I know that when we are trying to help our little friends we forget to start with the basics, I myself have done this. So if you could get us that info we will help you as best we can.

Ammonia Level 0
Nitrite Level? 0
Nitrate level? 20
Ph Level? 7.2
Ph Level out of the Tap? 6.8
Tank size(How many Gals) and How long has it been running? 25 gallons 2 1/2 years
What kind of Filtration? eheim cansiter filter , carbon/bio wheel filter

How often do you change the water and how much? I change 20% once a week
What kind of Water additives or conditioners? prime and gold trace
Any Medications add to the tank? just salt
How many fish in the tank and there size? 2 fish Darth is 4-5 inches Leia is 1 inch
Add any new fish to the tank? no
What do you feed your fish? pro gold
Any unusual findings on the fish? Such as
"grains of salt", bloody streaks, frayed fins, fungus? no
Any unusual behavior? Like staying
at the bottom, not eating, ect..? YES... lilting to the side and on his side in middle and bottom of tank. I'm afraid he may have a rock lodged.

I am afraid he may have a rock lodged in his mouth, but do not know what to do to get it out

Please help asap

Not sure if he has something stuck or not
took him out and did not see anything.

He swims and then lilts. He literally tilts to his side and looks like he is dead.
This started last eve, but then went away and seemed fine all day until this evening. I have added salt and turned off the light because I don't want to add additional stress. I'm just not sure what to do. He is one of my favorites, and I've had him for quite some time and will be devastated to lose him.

please help

Is he pooping okay? Does it look kind of like he has the floaties? like swim Bladder issues? Have you had darth as long as the tanks been set up?What does the color of his gills look like?

He has in the past had floaty issues... but primarily up and down not side to side. He's fairly big... and this new behavior is strange and unlike him....

I'm not quite sure what is going but I'll fast him for a couple of days to see if that helps...

How long have you had darth,and when was the other fish introduced to the tank?

I've had Darth for 2 1/2 years
He is about 5-6 inches - beautiful black moor

I added Leia in November of last year.

Darth is still not doing well... on bottom of tank curled on his side.

Worried he will not make it the night

HAve you checked water params again? When was the last time you did a water change?Did you treat the water and match temps? What test kit are you using? What salt % are you dosing-how much & how did you put it in? Are there no other visible signs other than that he was tilting on side for a while,and is now on bottom? What made you think that he had a rock lodged?

I appreciate all of the replys.
Darth passed away this morning.
He was the most beautiful fish. And we were so lucky to have been his parents for so long.
I still have no idea what took his life. But I am just glad that he isn't suffering any more.
His tank mate Leia seems to be doing fine. But will keep a close watch on her.
Thank you again for the advice and help.

I am so sorry to hear he passed away. This came on quickly huh? With that happening it is stumping on what it could've been. Perhaps a tumor that ruptured??? You may never know, I would keep a close eye on the other fish though.

Sorry again.

i am sooo sorry to hear what happened...i wish you all the best...i am glad to hear that leia is doing well