What fish to add to help control algae??

[howdy20012002]

I have finally got my 180 up and running and want some advice.
Being that my triggers pretty much eat anything that moves, I need some advice on what fish I can add into an agressive tank that will eat algae.
My other aggressive tank has HUGE algae issues because everything I put in to eat the algae in turn gets eaten by the triggers.
thanks in advance.
Neal