Magnetic Sand?

[treylane]

So I got a bunch of magnets to play with, to try making some diy mag racks with... just foolin around and dropped a ceramic magnet into the sand. I pull it out of the tank and it's still prettymuch covered in sand, which appears to have a very significant amount of magnetic material in it. Anybody notice this before? Cause for concern?

 

[GreshamH]

What sand are you using? Our local sand is full of magnetic material.

You won't get any of this with sands from places like Caribsea and Marco Rocks.

 

[tuberider]

I have a tank that I service that has a ton of iron in the sand, at first I was worried about the iron contributing to algae growth, but over the course of a few years it seems as if the iron is pretty stable, my point? YMMV.

 

[treylane]

I'm using Nature's Ocean Black Beach Sand... it's been in there a year and I haven't noticed any particular issues beyond the stuff you go through starting up any new tank. Ohwell, just surprised me.