what would you add next with this tank/fish?

[ultimate125]

currently, I have an 18 month old 125g 6' tank/40g sump with...

fish:

male blue jaw trigger
blue tang
6 line wrasse
candy basslet
3 ignitus anthias
2 bicolor anthias
tiny maroon clown
bi-color pseudochromis

corals:

toadstool leather
star/button pollyps
taro tree

1 cleaner/1 coral banded shrimp

I'm very open to suggestions on what kind of fish to add next...
if this was your tank, what would you add next?

thanks.

 

[blueray]

Before we go any further, what kind of skimmer do you have? Model?

 

[ultimate125]

before we go any further, what kind of skimmer do you have? Model?

das bx-2

 

[blueray]

I just did the research on das bx-2. I think you are OK to add more fish. Skimmer is the key to remove bad stuff from water that is why I ask. OK lets talk about fish that you have.

The blue Jaw can grow to a foot long. Anyway he is peaceful and likely not to cause any problem.

The maroon crown. I had that 6 inches long and he is aggressive/territorial. He will defend his nest.

Most of the fish that I see on your tank swim in the middle or top part of the tank. Have you thinking something like Goby species? Like yellow watchman, diamond. These are the fish that hang out on the sand/bottom area.