Tunze magnet in sump

[Proteus]

I picked up a tunze ato. Just wondering if magnets are ok in reef tank.

[apexifd]

those magnet should be coated with epoxy.

[gregzz4]

Are you talking about these magnets ?
They are safe if kept away from other equipment

[Proteus]

They don't appear to be coated. Just wondering about rust

[sphelps]

Magnets are made from iron so unless coated and completely sealed they certainly will rust which is not safe for a reef tank.

[Borderjumper]

I've wondered the same about the magnets that come with the Tunze nano ATO.. They don't appear to be coated!