Magnets

[BigT75]

Hey guys I am getting more n more into buying frags who isn't lol anyways I want a frag rack gonna make one from a egg crate and want it attached to the side glass with magnets can I use any magnets from say lowes or Home Depot ??


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[ssky]

I seen people use magfloats to hold the egg crates

 

[jcgso]

Not for inside the tank. Has to be coated/waterproof. You can find them on Amazon.

 

[mcgyvr]

Most Ceramic/Ferrite magnets can be used in water without issue without any coating applied to them..

The same cannot be said for rare earth/neodymium magnets..

Ferrite/ceramic based magnets are typically black in color without any plating,etc.. neodymium magnets are usually nickel plated (shiny chrome type look) or similar.

 

[billdogg]

I get mine from www.kjmagnetics.com They have them in a multitude of sizes and strengths, both bare metal and plastic coated. I got the plastic coated ones and they work like a charm.

hth

 

[ca1ore]

+1 for KJ

 

[Thomas Ng617]

I just made a frag rack out of a couple magnets that I picked up from the local hardware store and used a acrylic piece that was part of a little shelf thing

 

[Thomas Ng617]

I just made a frag rack out of a couple magnets that I picked up from the local hardware store and used a acrylic piece that was part of a little shelf thing

And oh by the way the magnets I bought were plastic coated except for one side which I used the silicone to cover and stick to the acrylic sheet that I have

 

[Zephrant]

Might be able to coat them in 5 minute epoxy too. I'm thinking that a little epoxy in a slightly oversized hole, then cover the magnet too. Black epoxy might look cool.

Looks like Plastidip may be aquarium safe too, anyone tried it? I ask because I have a stack of neodymium right here that would be convenient to use.

 

[Zephrant]

144 ceramic magnets, about 9 cents each: https://www.amazon.com/Nesha-Ceramic-Disc-Magnets-pieces/dp/B01CPMY89E

vs. 10 plastic magnets at $1.65 each: http://www.kjmagnetics.com/products.asp?cat=164

I'll try the epoxy first, then the ceramic ones at that price.

I see notes in the reviews that the ceramic ones are not very strong, might be an issue for a frag rack.

 

[ca1ore]

3-4 lb. of pull is unlikely to be sufficient.

 

[Webmanny]

Agree with the post above. I have done exactly what you are trying to do with great success. However, I used N52 20mm magnets, which have a pull of 19 pounds each. I just got some epoxy and coated them. No issues in several years that I had that rack.

This is a photo of the rack or a portion of it.

I even did some individual ones that I wanted to have the flexibility to move up or down to adjust for the light need.

 

[Webmanny]

Another view of the rack:

 

[jamie1981]

144 ceramic magnets, about 9 cents each: https://www.amazon.com/Nesha-Ceramic-Disc-Magnets-pieces/dp/B01CPMY89E

vs. 10 plastic magnets at $1.65 each: http://www.kjmagnetics.com/products.asp?cat=164

I'll try the epoxy first, then the ceramic ones at that price.

I see notes in the reviews that the ceramic ones are not very strong, might be an issue for a frag rack.

Those ceramic ones won't hold anything nor do they even need to be coated with anything. That is the same type of raw magnet that pump impellers are made of. They do not rust or corrode. Not in the same class as neodymium magnets which are super strong and will rust or corrode when not coated with something.

 

[Zephrant]

Good info, thanks- Looks like the neodymium ones, coated somehow are the best plan.