I have 2 false clown fish and 1 diamond sand sifting goby .
I wanted to add either a blue hippo tang or a powder blue
My tank is only a 70 gal
with about 75 lbs of life rock .
In one end is where the clown fish and anemone have set up home and closer to the middle is where the goby lives .
A few different things to consider .
Fighting : I started with 10 hermit crabs and they seamed to kill off the weaker ones and I might only have 5 of them left now .
The goby and clown fish all seam to be territorial guarding their side of the tank .
Can I put a different breed of clown fish ?
Damsels , wrasses ,