Magnets is there anything to look for

[TinyWood]

So I'm looking for a magnet to hold a small clay pot on place on the side is there anything I need to avoid so the magnet doesn't leach anything into the system

 

[Idoc]

check out Octo Aquatics. He sells magnets that are encapsulated and safe for aquariums...also some good info on his site. You could probably even send him a message on here @cromag27 and he could give you some advice.