Raising a flying phoenix can be easily solved.

You invited the sweeper out because he was afraid of sucking the shell of a pig-nosed turtle, right?

Sealing flying fish likes to peck at the cylinder wall, which can play the same role as a scavenger, but it will never peck at a pig-nosed turtle, belonging to a gentle temperament.

Or you can wash it regularly with an aquarium brush. There is a magnetic brush with a handle. Choose small, medium and large models according to the thickness of your aquarium glass.