Aquarium safe magnets

I wouldn't worry about it on a glass tank as much as acrylic, you could also wrap a piece of fine mesh or a fish net to 'pad' the magnet a bit. The only other caution is that rare earth magnets grab eachother hard, if you don't have a good hold of the one on the outside glass when you are getting close to putting it on, the magnet could slip out of your hand and slam into the glass, cracking it. People have had fingertips sliced off by playing with those magnets as the finger got caught between two magnets as they pulled together from a distance.

I've been using mag floats and mighty mags for around 20 years. Never Been cut or cracked any glass

Dieselhybrid said:

I've been using mag floats and mighty mags for around 20 years. Never Been cut or cracked any glass

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The magnets in mag floats/mighty mags are not as strong as the rare earth magnets they are referencing above. Riparium Supply initially used rare earth magnets on their riparium plant holders, but had to stop because the magnets were cracking tanks.

I'd go with a mighty mag. They have replaceable pads that are acrylic safe. You can get varying strength magnets too. I have one on 1" acrylic and it does fine. Magnets are coated in thick plastic and not exposed. You can even get a scratch remover pad to polish your acrylic without draining the tank.


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Etan said:

I'm more worried more about an exposed metal magnet rusting inside my tank. I didn't know if anyone made coated one that are safe under water for long periods of time.

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use krylon fusion spray paint,, its aquarium safe