OK i have had this tank up for around two years. I had a nice assortment of fish in it, and the oldest being 1 year and a half old. About a month ago, I ordered some coral and those big turbos for my tank. I acclimated them with the drip method and put them in. Now 8 out of the 10 snails died overnight or were dead. They rotted and well my tank is tiny so the ammonia was high and it killed about everything. I saved a bluespotted jawfish, bubbletip anenome, some snails and hermits, and some star polyps by putting them i my qt. Well I cleaned out my aquapod, and even replaced the sand with the bio active stuff, refilled it with saltwater, using some cycled water and some new water. Put the sand in it, along with my live rock. After about a day, I put all the animals back into it. About a week ago, I noticed my bluespotted jawfish was acting a little weird and i noticed a white mark on its side, that was only a speck before, so I qt him with the proper medication, but he died the next day. Everything else in the tank is doing fine, but none of them are fish. So about three days ago, I bought a small dogface puffer, and a small sailfin tang. I put the dogface in my qt and the tang in my ap, each after the drip method. The tang was acting fine, even yesterday night it ate. This morning i find it dead. Now the dogface in my qt is fine. I have two things I am thinking that could have caused the tang to die, the temp is going up to 84-85 degrees or I also have many aptasia anenomes that Im tring to get under control. Could they sting the tang? Was it the temp? Any suggestions on why fish keep dying in my ap?