Ceramic Magnets and Saltwater Emerrsion

[KingRicky]

What are the effect on a tank with ceramic magnets submerged in the saltwater? I am building a DIY magnetic frag rack and need to know if the magnets need to be encased in silicone.

 

[roshi719]

I would epoxy coat them just to be on the safe side.

 

[cparka23]

those magnets are made of iron oxide. probably not a good thing to expose to saltwater.

 

[mfinn]

Ceramic magnets are considered to be reef safe. I've used them in my tanks for years. They don't rust.
Besides most powerhead impeller magnets are ceramic magnets.

 

[KingRicky]

Didn't think of that.

 

[roshi719]

those magnets are made of iron oxide. probably not a good thing to expose to saltwater.

You mean iron oxide as in ferric oxide? as in GFO phosphate remover?

 

[Paul_N]

Ceramic magnets are considered to be reef safe. I've used them in my tanks for years. They don't rust.
Besides most powerhead impeller magnets are ceramic magnets.

Yeah, but most are sealed in some type of epoxy aren't they.

Never mind, I was thinking about the top of the MJ's where the electrical stuff is. doh

 

[cparka23]

You mean iron oxide as in ferric oxide? as in GFO phosphate remover?

touche...

 

[Nomadic1]

Where would one buy ceramic magnets? I have been using rubber coated/plastic coated ones, which all seem to eventually start leaking after a while, from KJMAgnetics.com.

 

[KingRicky]

I picked mine up at hobby lobby. 6-1" round disc cost $1.99