So over the past three weeks I have had a few fish casualties. A fire fish, sunburst anthias, and a spotted mandarin. All of them were new additions to the tank and I attributed the deaths to them being too shy and being outcompeted for food (The mandarin passing wasn't a surprise, my tanks pod population couldn't support him). Whenever they died there wasn't much time for me to notice any strange behavior they would just wind up dead. Now my Melanurus wrasse seems to be sick but unlike the other fish that died I have had him for over a year and he is definitely not getting outcompeted for food, he's the biggest fish in the tank. He always sleeps underneath the sand and for about two days he never came out. Then yesterday he emerged floating vertically and getting blown around by the power heads. He eventually swam under a rock and stayed there all day unmoving. I moved him to my new quarantine tank and he is still alive but laying upside down. There are no physical signs of disease on him, no spots or anything strange looking. I read some things about swim bladder. Does anyone have experience with that? Or does is sound like something is going through my tank? I bought a "All in one Remedy" medication for MarineLand, should i treat the quarantine tank with this? I took my water to be tested and everything is in check there so I'm really lost! Also the fish still remaining in the tank (2 Banghaii cardinal, a flame angel, 4 yellow tail damsels, black and white clown and pink spot goby) All are acting normal.