Saltwater Safe Magnets

[BlazinNano]

Are there any smaller saltwater safe magnets? Would like them to be kinda strong.

 

[SaraB]

I know the sure grips work in saltwater.

 

[MAXreefer]

You always could look in the Tunze store "spare part" section. Those are SW safe

 

[BlazinNano]

I know the sure grips work in saltwater.

All I can find from them is the glass cleaner

 

[SaraB]

Here's them in the powerhead holder version ... just skip attaching the powerhead stuff and just use the magnets.

AF-SG50 Premium Aquatics - AF-SG50 Aquarium Supplies=

Just search Sure Grip Magnet

 

[BlazinNano]

Really looking for something strong and small to attach stuff to the glass. Might just have to get regular magnets and encase them in epoxy.

 

[mfinn]

Really looking for something strong and small to attach stuff to the glass. Might just have to get regular magnets and encase them in epoxy.

If you want them really strong then get neodyium magnets which can be found here,
APPLIED MAGNETS-Neodymium Magnets-Rare Earth Magnets-Ceramic Magnets-Industrial Magnets-Magnets Wholesale To The Public
Industrial Neodymium Magnets||NdFeB||Magnetic Assemblies||Wind Solar Power

I've made a bunch of frag racks for myself and others and I use the neodymium magnets and encase them in polyester casting resin.
I also use casting resin dye, because I believe that if you don't the light from our tanks will degrade the cured casting resin after a few months.

Also, if you use ceramic magnets, you don't need to encase them in anything. They are reef safe.

 

[steamboat]

I tired to cover regular magnets in a ton of super glue. It only worked for about 2 weeks and then the magnetics were rusted! I guess you really need to resin cover them!

 

[Jcr's Reef]

You can buy Neo. mags. already coated too. I bought some a while back and still use them to this day.

 

[drainbamage]

do you remember where you purchased them already coated?


also- for the casting dye- what products are used?

Been wanting to make some of these or buy some already made, would really appreciate all the details on how to do it, but thanks for the info already provided!

 

[Jcr's Reef]

Already coated
K&J Magnetics - Products

Regular
K&J Magnetics - Product Categories

 

[mfinn]

When I mentioned the dye, it was only because a guy ( DonW) on Reef Central used some casting resin, but reported that after about 5 months it broke up. Just came apart. Didn't hurt anything because once the resin cures, it's inert.
So I gave it a try and used some black dye in mine. I got it the same place I bought the resin and molds, mixing cups, etc.
I have a couple frag racks that are now about 2 years old and I have some people in my area, I made racks for that are just as old. So it's my guess that the dye prevented the light (UV rays) to damage the cured resin.

The place I get my magnets from sell them with a epoxy coating, but IMO, they wouldn't last long in saltwater. Too thin, IMO.

I use the epoxt coated ones for the outside magnets. Works fine there.

 

[drainbamage]

Can anyone ease my mind that the rubber coated ones from K&J are good to go without having to epoxy coat them?

Also- If I need to epoxy coat- which epoxy/resin is being used? Any that has best results?

 

[mdb_talon]

I dont think mine came from k&j but have had good luck with ones that were plastic covered. Had them about 9 months. I also put 6 in my sump my plan is every 6 months to cut them open and see if they rusting. As of a few months ago it was fine

 

[BlazinNano]

Those plastic and rubber coated ones are expensive. It would would be cheaper to use a magfloat.

 

[drainbamage]

cPath_1_123 | Applied Magnets : Epoxy/Nickel Coated Neodymium Magnets - discount wholesale prices.

this place has the epoxy coated ones for very cheap- just want to make sure that the epoxy isn't going to break down in the saltwater- especially as one of the other coatings is copper ps:

 

[mfinn]

I use the epoxy coated 1" x 1/4" neodymium magnets for the Outside magnets on my frag racks. I don't think I would trust them for very long on the inside.
I did buy a couple 1" x 1" 1/4" square rubber coated neodymium magnets and they do seem like they have much more coating on them, than the epoxy coated ones.

 

[fsu1dolfan]

Bulk Reef Supply has some nice rubber coated magnets too. Not sure if you have seen them but BRS has a good rep. Rubber Coated Replacement Magnet for N52 MAG Rack - Oceans Wonders - English

 

[drainbamage]

thanks guys for all the tips! If I go for one of the uncoated ones, can anyone suggest the best resin to use?

 

[mfinn]

thanks guys for all the tips! If I go for one of the uncoated ones, can anyone suggest the best resin to use?

I used Castin' Craft polyester resin.