Best invert for algae on frag plugs

[prime8reef]

What would be the best critter, snail or other to clean up algae on frag plugs.
I have several frags in a magnet track on the front panel of my tank. S what snails have you had the best luck with that can get in tight spots and clean up the plugs?
I do scrub with a toothbrush and keep nutrients to a minimum, but get this algae every so often pop up on the plugs.
Removing the rack every two weeks is a pain as well as dipping the plugs every time I see it growing.

 

[kireek]

I like turbo snails for eating hair algae.They can be cumbersome though.I like to put vacant frag plugs in between corals.This creates a tighter grid that is harder for them to topple.

 

[Bad Company]

My dwarf hermits clamber over any new frag plug and pick it clean.