Can I add a geometric hawkfish or over stocked?

[joec]

Should I add is the better question? Tank is established 53G (36x18x21) 29 sump. Reef octo Essence 130 skimmer. Weekly 10% WC

I have:
4" Timor wrasse
2" pink streaked
3 " flasher
4" yellow jawfish
2.5" tailspot blenny
2" royal gramma

Parameters are fine

 

[Pbh-reef]

They are small and basically peaceful fish I think you
Will be fine