One fish away from completion....doable?

Hello all,

First off here are the basics:

180 l (48g)
about 20 kg live rock
5 cm live sand bed
30 l sump+refugium
salinity 35ppt

up and running for about 7 months now.

Live stock:

FISH

1 6 liner
1 diamond goby
2 yellow tale blue damsels
2 percula clowns
1 flame angel
2 mandarins (male and female)

CUC

2 skunk shrimps
2 blood shrimps
3 peppermint shrimp
about 8 snails of different sorts

CORALS AND INVERTS

4 BTA (green,red,pink, orange......i have a weak spot for BTAs)
1 green acro
1 galaxia
1 torch
1 hammer
sevral zoas
2 xenias (one pulsing one not)
several ricordeas

QUESTION!!!!

Right so im reaching the limit of the tank here quickly (if i have not passed it yet) I was wondering if you lovely folks think i have enough space for a yellow tang and possibly one linckia starfish.

this would be the last elements i will add before i can consider my tank complete.


P.S pics will be up soon

 

In my thought you already have surpassed your limit of fish, and you should have at least a 75 gal tank for a tang.

 

And the linkia needs lots of space and will be competing with your cleanup crew. You will have to target feed the linkia also.