My RTG looks sick and I'm stumped as to what's going on. Really worried that I'm going to lose this expensive fish! 
What happened was on Thursday I moved him to a different tank. He seemed ok, a little skittish that I assumed was from the move. Ate lots of shrimp like normal. However then on Friday he was laying in the bottom back corner not moving. Then it started swimming with its back end limp. Did a 50% water change and it seemed to be ok again. However sometime last night it became lethargic again. Color is very faded. I noticed today that there's these little dark spots on the upper part of his body that I have no idea what it is. I did another 50% water change and also bumped up the temperate to 30 degrees in the tank in hopes of getting him back to health. I've included some pictures to see if someone can advise what the heck is going on and if they have any suggestions as to what I should do.
What happened was on Thursday I moved him to a different tank. He seemed ok, a little skittish that I assumed was from the move. Ate lots of shrimp like normal. However then on Friday he was laying in the bottom back corner not moving. Then it started swimming with its back end limp. Did a 50% water change and it seemed to be ok again. However sometime last night it became lethargic again. Color is very faded. I noticed today that there's these little dark spots on the upper part of his body that I have no idea what it is. I did another 50% water change and also bumped up the temperate to 30 degrees in the tank in hopes of getting him back to health. I've included some pictures to see if someone can advise what the heck is going on and if they have any suggestions as to what I should do.
