No clue why my butterfly died! Brought him home on tuesday, died yesterday on thursday night. I acclimated him right, floated him for 20 minutes and added water to the bag every 5 minutes 3 times. Let him out and he was fine and happy for the first day and the 2nd day he was fine and yesterday he was fine and last night he was slinking around behind the rocks and i noticed the back part of his body was a reddish color and i came back an hour later to check on him and he was lying on the bottom. my pH is fine, nitrate is 0, ammonia is 0, salinity is fine, i did a water change like a week ago. I also brought home a very small clown and never saw him again, I thought he was hiding in the rock. Perhaps it was just a sick fish to begin with? Or could it have something to do with that particular fish store catches fish with cyanide. I'm about ready to give up on my saltwater tank after losing a tang and puffer to ignorance and bad advice from the LFS
. Then I went to a different store and bought live rock and a protein skimmer and they're the only store who hasn't steered me in the wrong direction. So any clue what's going on?