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BigT75
09/22/2017, 09:18 AM
Hey guys I am getting more n more into buying frags who isnít 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
09/22/2017, 12:02 PM
I seen people use magfloats to hold the egg crates

jcgso
09/22/2017, 12:15 PM
Not for inside the tank. Has to be coated/waterproof. You can find them on Amazon.

mcgyvr
09/22/2017, 01:16 PM
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
09/22/2017, 01:21 PM
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
09/22/2017, 02:43 PM
+1 for KJ

Thomas Ng617
10/01/2017, 09:06 AM
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
10/01/2017, 09:08 AM
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
10/05/2017, 12:15 PM
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
10/05/2017, 12:25 PM
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
10/05/2017, 07:14 PM
3-4 lb. of pull is unlikely to be sufficient.

Webmanny
10/06/2017, 03:02 PM
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.
https://lh3.googleusercontent.com/O1gg9XYEevqu0bzosPepy0V8QSNLrzE6ubMKGx-qrvgQKka-RaQqP7JtWuv9MjzJter_OON7Rw6nNpyKY8QHh9Efx4OpM18SXUiKYEnKy6zmikHc-XW06k56EClCUmJH7gXbnqvkeJ-gn6S6StiVs5NDP7aW4BIKrx438xqi1vVsC0RiXoRtn3ACwm102A39tO116ZPAlWwer_pyBJFgW5z3boQJQWVgN6huTA7neWKfEjn IpquXykm0OrqoUHuxGJ6LW4BJiDp34pkkJwgHd95lsZz_wvzafdzvjF76ouQUSXDxxfhkFpOec2lRfpMTXqFGkbqzfiPMoHQ_Nx8-9ZObBdKSxww5vJKTKk2cTKXbFZBXAGguBoG5way3zbGCaN7v5HZpDAvU6IDY-GOHG_jw4dlNmyWYeVs67YlkneDVBVdpeVSxDsz-k3bhkOL8nH5UJ5ECtU0o17zSftLMxHOXEeNccATGpnz2Q6ZP5hHcSFTfBFHCOaVSidwxI4VWABEtnkRKTOkg3UTb3QyfA-Eb5pGB8s-4iA3QWItXwZiElR0lQgDK1UlLlbrhjifnDSdpzlq4womzFyJ45H53eNW8G9jBAZ403Tqi55uWaw=w1009-h757-no

I even did some individual ones that I wanted to have the flexibility to move up or down to adjust for the light need.
https://lh3.googleusercontent.com/AXMjmb0_e5DfEUUD0zNpDCi-sVm9w2kei2DSJ6jWndXnUh2UYplmYdaccKKkPgjRCbpHdVIO5Ci372Vc3iAMa91tXVWvOCyeBiTsk-hVNCcUTyXf95sHLOBjsghq9VHIEueSbPygQgF7pCMi97-yxYyZtUAP4kGP__IyomzmEsoPA-uHcH-or2UtQy3wLCek5GoXic841isaL7-GSWloxtTXCHe9XduLPHX4RETCsAcc5fYmBg9xfnfgGEgnej8BESaJxwQPuIwiubytQnGJrpeZzRaDEkWqeh6jYht9zoiQZ13NMXA uNUDkqkraDrY5HtpNmgUMiyRNo7vx-lsqnNsIcY3y4pP1ja9NOeNtMdMQdmiRmfgXfHHZOVD_vpiTves8PBQvHpPEIvtQk6NO5CtjjhRCXpzYIZo2J66f905K_kgitMSFY CeLM462wCEzsPzFJGZ_-q4K9pEV1L-NbExpo2gwcKf_lxcCX1Da2_3_FSBR7K6hG7K5vxYVSVwvDn33MhcM1F7qLn6GDxUU3UDQV1bTsNJzgG-pRkIas8X_Hu3ikE3M8AFJDG_mXi2qUdCcuTSAgkHeyUoU_GxSI4KWCHKzJAlIKqEOczVPpQ=w1009-h757-no

Webmanny
10/06/2017, 03:03 PM
Another view of the rack:
https://lh3.googleusercontent.com/xnF0XF58apTGOTb3cwRnIMXp7rQpLW8Jce0_F0OC1B2AL8AiYEve7TL9GSsMMN68x1pUifbED7BubppMYF_Iv5eMhoR5vihdkAAV TJphXgiTKATcF3qOWdPruziySQywRJwRdjgAe-ZzRY5ucIQG2F8z5Huhea2utrvJdG0cDk4crjWZJCmSmm_opRXAtIzVLi5Eju-3IaKaxVeTK8lCmx49uOS05kM6pXpRc1JZ_loeAA9K3yLcA_oQanKpIbeHLHN_xTobPYHXJtqw4C6cJB-riFKRu6zjqg9qCZ3z1NnqR-5CNB68f7VRavpr_bVZ_GA_9FxsYvzfCJtfLzhlmSEFvEWVStQ0dJ_Wmzz4fY5tTIxAt5WQ0ByZ9rfdhj1B4j_m0vt3pOu4fVlvny YbEIgmV32sasDiitSFso88uJ4F_nFfcM1ZK1vddgatiJKh97gUX47AxZaC-GKNZRTi6EnGoOahIkVVvNaRXaaAQOdVA0kae9gc5UM_RlUUBsb5avSJxzqky2KE2KP0KWTVVJUjmuTNfs4UawfIrtg4jMfuRcMdV dIKvSNAh3H3FCX6xkFERlZuBbGmnQpdnagXXoOkV7k1QbD0w5ZIW4vEwA=w1009-h757-no

jamie1981
10/06/2017, 08:46 PM
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
10/06/2017, 09:22 PM
Good info, thanks- Looks like the neodymium ones, coated somehow are the best plan.