Hello, good people. I'm considering adding a fish. I have a 29 gallon reef tank with one yellow watchman goby, one pajama cardinal, and one cleaner shrimp plus the cleanup crew (blue leg crabs and a couple of turbo snails). MY parameters (alk, calc, mag) are little high but getting under control as I have paused auto-dosing for now. I tried adding a dottyback about a year ago but he didn't last more than a coupe of days. I thought the other two took him out but they're considered peaceful so I'm thinking maybe it was my water quality which at times was not great but is much better now due to upgrades on my system. I want to try again. what kind of fish can I get that is colorful but also not too aggressive that can coexist peacefully with a watchman goby and a pajama cardinal. Also, would two "peaceful" fish like mine be territorial enough to act aggressively toward a newcomer and possibly torment it to death? It could have been stress or maybe I didn't drip him in long enough to get him acclimated correctly. I'm going to try one more time and if this one dies and I know my water quality is good right now, then i'm going to assume these guys don't want a roommate and leave it at that. Thanks!