Several things can kill red bugs and the monti nudis, but yes, like you said, not the eggs. Several people have tried constantly dipping their corals in similar products to kill the adults, but it's not effective as these pests reproduce too quickly. I don't recommend it. Bite the bullet, QT, and if you find these pests, use proven methods to kill the adults and eggs. Continue QT for at least another month after the last sign of a pest.