I have tried everything fish (Butterflies, angels, filefish), Joes juice, aiptaisia X, etc etc. Kalk, nothing will kill them, or eat them. Finally, i gave up, ripped my tank down, nuked all of my rock and started over from scratch with dead rocks.
My tank looks awesome now, and no majanos. Huge headache, but no majanos

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90 gal SPS display+65 gallon mixed reef
GEAR: Korallin calcium reactor, bio pellets, digital aquatics controller, Tunze ATO, MP40, 4 x Tunze 6105 w/controller, Reef Octopus Xp3000 ext, 2x250w MH, Futura LED.