do you need a tang in a 150g FOWLR tank?

[sensei]

I just started my first FOWLR 150g tank.
I have experience in reef aquariums were I have choosen fish because of their funtion. some algae eaters, flat worm eaters, etc

in these FOWLR I have only choosen fish that I like, regardless of what do eat or do

I have the following fish now:
Picasso Triggerfish
Heniochus Black & White Butterflyfish
Clownfish
Porcupine Puffer
Lyretail antia
Cortez angel
Latticed Butterflyfish

I do not have any tang, thus I am not sure if algae could become a problem?
please let me know other fish that would be woth adding

thanks for your advice

 

[Dmorty217]

the butterflies and angel will pick at algae in the tank

 

[sensei]

thanks a lot Dmorty