In tank, my black ghost knife generally hides all the time. and for some reason i can tell its not doing well. because its not hiding... and its not swimming straight. it seems more as it its swimming on its side. I am sure it is well fed. because it ate this morning when i was feeding the others. But not only that... its swimming near mid surface area.... and its not really moving just swimming in 1 spot near the overflow filter. This happened after i did a water change today. But I do water changes almost every other day and it seems to be doing fine. At night when im sneaking up on the tank (cant see me) i can tell its fine because it swims like everywhere. Another thing is i just put some aquarium salt into the tank as well.... is it because of the aquarium salt? or maybe the water change? (this water change was a little bigger than normal.) i put the aquarium salt because my amazon sword plants seem to have this strange fungus(white cottonlike film). I read somewhere it will help...
please help!
please help!