I'm sure this has been tried at one time or another. I'm just thinking out loud . Most of us would use some method of dipping corals before putting them into a QT. Watching my wife bring her rings to the jeweler for cleaning got me thinking. The jeweler uses a tank of liquid cleaner that pulses at a high frequency to dislodge dirt & debris from jewelry. Has anyone ever tried sound or vibration to remove pests from corals? I would think that sound or vibration would be safer for corals than chemical dips. Like I said just a thought.