Hello reefers! I am fairly new(less than a year) to the saltwater aquarium hobby and currently have a 110 gallon system(90 gallon display with 20 gallon sump) that is setup as a mixed reef tank. Already in the tank are 3 ocellaris clowns a sand sifter goby a mandarin dragonette a 6 line wrasse and a coral beauty angel. I previously had a powder brown that unfortunately passed away due to an outbreak of velvet from a fish i added without quarantining. I have since removed all fish from the tank and they were placed in a hospital tank i setup for approx 6 weeks and they are all super healthy now. I want to know your guys opinions on adding a powder blue tang and a yellow tang to the system, also where I might be able to buy these fish from a reliable store since my local petco isnt really preferred anymore. I would like to get them as young/small as possible and add at the same time to hopefully negate any aggression they might have toward each other or the other fish in my tank. Of course any new fish will go immediately to my hospital/quarantine tank for observation for a couple/few weeks until I am sure I wont be introducing any sicknesses to my display tank again.