So I recently put a large zoa colony (40+ polyps) into my tank, first time ordering corals online. Anyways they were not attached to anything so I kind of loosely wedged them in a crevasse so that they would eventually attach themselves to the rock. Soon after they started to open up, but only about half of them did. Three days had gone by and I was worried about them so I took them out and into a bowl with tank water to inspect them. They smelt like I can only imagine what a rotting corpse would smell like (I am assuming that this is not normal?). I gave them a freshwater dip to see if there were any critters but nothing. i also inspected them to see if there was anything obviously wrong with them. I then proceeded to remove what looked like damaged polyps, and I ended up with 4 separate colonies and a bunch of dead looking polyps. So I dumped the bad looking ones and placed the 4 colonies back in the tank. I am now wondering if I should have done what I did or let them be? The last thing I want is for dead zoas to be rotting in my tank and fouling up my water. TLDR Zoa colony i bought smells like death, is this normal? I assumed it wasn't and removed what seemed to me to be sickly looking polyps and then placed them back in the tank...should I do anything else?