What magnets for DIY things

[Anchor]

I am considering making a few Frag racks to stick to the side of my tank(s). I read neodymiam were usable but shouldn't you coat them with something? If so, What?

I want magnets to hold for at least 1/2 inch glass.. what size neo's are suggested?

 

[3dvice]

For 1/2" glass I would use either N52 rated 1" x 1/4" neodymium magnets for small and medium racks or N52 rated 1" x 3/8" neodymium magnets for big racks. These are common sizes that nicer commercial racks like Reefing Art etc. use. You'll want to fully encase them in either acrylic or epoxy to prevent rust and polluting your tank.

https://www.magnet4sale.com/n52-1x1-4-neodymium-rare-earth-disc-magnet/

https://www.magnet4sale.com/n52-1x3-8-neodymium-rare-earth-disc-magnet/

 

[Anchor]

Has anyone tried that Dip stuff you can get at the local Big hardware stores? Use it for like pliers handles.. rubbery.. Or does this not coat well enough?

 

[Anchor]

For 1/2" glass I would use either N52 rated 1" x 1/4" neodymium magnets for small and medium racks or N52 rated 1" x 3/8" neodymium magnets for big racks. These are common sizes that nicer commercial racks like Reefing Art etc. use. You'll want to fully encase them in either acrylic or epoxy to prevent rust and polluting your tank.

https://www.magnet4sale.com/n52-1x1-4-neodymium-rare-earth-disc-magnet/

https://www.magnet4sale.com/n52-1x3-8-neodymium-rare-earth-disc-magnet/

Thanks, have looked at amazon but like this better. At least I know what I am getting.

 

[Hermie]

Here's what I did recently, (although I did just remove the piece because of non-magnet reasons)

Take a bottle cap that your magnet can fit inside:

• gatorade
• 2 litre of water or soda
• gallon jug of water
• anything that houses water usually

coat the inside with silicone OR reef-safe epoxy and then push the magnet into it,
once the epoxy or silicone dries (at least 24 or 48 hours depending...),
add a layer of silicone on the top side to cover the whole magnet.
Now, I know silicone doesn't adhere to silicone, generally, but you can wrap the whole thing in seran wrap or PTFE tape if you are worried.

It worked for me anyway... just get a plastic cap big enough for the magnet to fit inside, and you have to majority of the magnet's metallic surface "safe" from your reef water, the silicone does the rest.

 

[Hermie]

not worth trying IMO, silicone works fine

 

[Crustaceon]

Magnets...How do they work?

 

[mrjoev]

i've used these: https://www.amazon.com/gp/product/B01LYD051P/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

They are already sealed, and then glued them to my 3d printed racks, mounts, etc. 12 pc for $15ish, but only 5lb pull though .