last fish for my 26g ?

[Acipenser]

Current stock: 2 percula clowns, 1 wheeler's prawn goby . custodians 4 or so red scarlet hermits , a dozen or so left clawed hermits, a dozen or so various snails, 1 cleaner shrimp. corals : 1 6"+ leather toadstool .

I was hoping to add a group of blue green chromis . But fear that would be too much stock ? 5 or 6 ?