Rust/Koralia magnet

[Davoaldo]

I have always wondered.....

1. Will the rust from pump shafts, Tunze stream metal screws or other equipment cause any harm to a reef tank?

2. I noticed for Koralia PH the magnet is not 100% water proof, it jsut have a rubber seal. Will this wear over time and break down into the water and release bad stuff?

3. What about Magfloats.....

Thanks in advance.

[bertoni]

The rust from equipment intended for saltwater use doesn't seem to cause problems in our systems. The volume tends to be very low, in any case. I'd likely discard a magnet when its seal cracked, though.