Tank size and compatibility for flashers?

[ben01]

I currently have a 65 gallon reef tank and would like to add a couple flasher or fairy wrasses. Besides the size of the dt I would also like to know if a 20 gallon qt is enough for two at a time for a month. I am looking at the small 3 to 4 inch wrasses like a carpenters wrasse for instance. Lastly, should I get different species to reduce aggression?

Currently:
1 checkered cardinal
1 royal gramma
1 harptail fang blenny

Thanx.

 

[ksicard]

I have a 20 gallon QT and have had multiple fish in there several different times with no issue. But it also depends on what multiples of fish are being housed together. Certain wrasses don't always play nice with other wrasses. This could be in correct but I usually gauge wrasse compatibility by the first name of their species name. For example if you mix two wrasses that have Cirrhilabrus in their species name then there is a fair chance you will see aggression between the two. This isn't always the case but that's how I generally go about it. Lastly, you could purchase a acclimation box to see how they will respond together. Plop one of the wrasses in the acclimation box and observe to see if there will be any aggression.