I have a 90 gallon reef that has been set up for about 3 years. I have the following fish in it currently: 2 Picasso Clowns Midas Blenny Kole Yellow Eye Tang 3 Pajama Cardinal fish Melanurus Wrasse Dwarf Flame Angel All of these fish have been in the tank for at least 1 year. I have tried about 1 year ago to add additional wrasses (Lubbock & Carpenters Flasher) and an Orchard Dottyback. When I added the wrasses, I did use an acclimation box. But after several days/weeks - the Melanurus would not stop picking on them - so I had to take them out. The Orchard Dottyback was just too timid for the tank and would hide all the time. I would like to add 2 more fish, but really concerned with what I could add? Do I have to add some more aggressive fish (i.e. Purple dottyback, Yellow tail damsel, etc)? I've considered a longnose Hawkfish as well - but I do have shrimp in the tank (cleaner, peppermint). If I added those 2 fish (Damsel/Dottyback), would they end up being too aggressive for the tank? What are some other options that I can consider? Do you think I could add the hawkfish, or would it eat the shrimp in the tank?