yesterday i noticed my ck had a cloudy white bump on his eye, his body fin looked white and ragged on the tip all the way from front to back, his other fins are clamped, doesnt eat, and barely moves. the other fish are fine. i did a 50% w/c with stress coat, added salt, bumped the temp up 1 degree, and left the lights off. what do you think is wrong and what else could i do? should i just wait and see what happens?