I have a 60 Gallon Reef tank that has been set up for around 1.5 years, currently I have 4 fish in the aquarium which are an Azure damsel, a Tomato Clownfish, a Pajama Cardinal and an algea blenny. The damsel and pajama Cardinal and damsel were the first fish that i added to the aquarium a month after cycling. The two others came a few months later. I have never been in a rush to stock this tank but It's very frustrating because new fish always disappear after one night. Cardinals, Gobies and more. longest i got was a wrasse which lasted 2 months. When i add these new fish i ensure theyre acclimated and i rarely see them get bullied upon entry, more like politely ushered to the back of the tank. Im not sure what to think. Predators, shock or night time aggression. what should i do. I have other livestock such as cleaner shrimp and a red legged hermit crab, if this helps give an insite. Aggression is at the top of my suspect list as the tomato will attack my hand if it gets the chance, even then I haven't ruled out everything and am still undecided