what is wrong with cat. HELP!

[klmt]

so i bought a 3" silver tipped shark yesterday from Petco (i know i hate the place as well) but it looked just fine with the others in the tank, and it ate when i brought it home yesterday and all seemed fine. i got home today and he is swimming aimlessly, and seems to be kind of clueless. He kind of twitches every so often, and he doesnt look good. he is thin but i figured that was from being at Petco. What could be wrong?

p.s. there is aquarium salt in the currrent tank, and all params are good, it is an established 45 gal. tank that i have had no problems in for years. regular water changes and all.

 

[mqktandy]

this happened to mine to. He was fine for about 2weeks eating massivore good and everything. than just started to swim up against the front of the tank aimlessly and stoped eating. Havnt been home for a few days so Idk whats happening but I hope hell be ok.

 

[klmt]

ya mine died that same day, but i bought some good medicine for future problems.

 

[aidenb]

if its the same as a columbian 'shark' catfish, aquarium salt wont do much, they need marine salt in their tank.