07-22-2007, 01:58 PM
Join Date: Apr 2005
Location: Brentwood, CA, USA
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| | Re: Bare Magnets Aquarium Safe?
The magnets are probably alnico, an aluminum, nickel, cobalt alloy. If so, it doesn't seem that there would be a problem other than corrosion of the magnet. Rare earth magnets might be a different thing, since I don't know if any of those elements are toxic to plants or livestock.