Foxface for hair algae with black back bfly?

[EmilyB]

I bought a lawnmower blenny, but no, they don't eat hair algae...

The tank is only 65g, so I am reluctant to add a foxface as I well know how large they grow.

I might try it for now though, if I can find one that won't be miserable with a 12 year old resident butterfly.

I'm thinking one of the blue lined, orange spot or scribbled since they are less similar in color.

Any thoughts?