algae removal

Hi all, I recently have been trying to figure out a way to use an ultrasonic transducer to clean off year old coralline algae that is incredibly strong. Normal plastic scrapers don’t do the job and metal ones will cause scratches. Attached is a video of a test I did using a handheld dental...

I have an older tank. Have five fish a 4 small corals. I am moving in about a month. This is an old tank and the rock smells like old algae. I was thinking about kinda starting over, but the live rock is very red and green coraline algae encrusted and there some stuff growing on it, both good...