Octo Strong Probe Holder

(16 customer reviews)


Don’t fall for wimpy magnets!  I revolutionized the usage of high-powered magnets in our industry!


Made from 3/8″ clear acrylic and can hold on 3/4″ glass! All four holes are large enough to fit the Apex temperature probe. Also available with just two holes.  External magnet needs about .625″ for clearance.thick.

(Style of screws may vary)

I use N52 neodymium magnets. Rare earth magnets are not reef safe on their own, so I fabricate custom acrylic pods that encapsulate the magnets and keep them away from your water. Please visit the magnet warning page for more information on these magnets.


My products are made to order, custom! Please allow up to 10 business days for fabrication time for most products. Because my products are made to order, fulfillment time can rarely take longer. Full custom orders can take up to four weeks to complete. Please let me know ahead of time if this may be an issue. Shipping prices listed are to the contiguous U.S. Please contact me if you live elsewhere and want a shipping quote. Because my products are handmade and/or hand assembled, there may be small irregularities (fingerprints, marring, hair, etc) which will not effect the performance of your product.

Plastics are fragile which can break and scratch easily. Always handle with care. Surface can be cleaned with a very diluted soapy water mixture and a soft microfiber cloth.

This product is warranted to be free of defects for the lifetime of the product. We will, at my discretion, repair or replace your product at no charge during this period (See the Warranty page for more info.)

Additional information


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16 reviews for Octo Strong Probe Holder

  1. Amanda C. (verified owner)

    LOVE these probe holders. Keeps my temperature probes in place and makes my life easier from not having to fiddle with suction cups that always fall off!

  2. Amanda C. (verified owner)

  3. Colby D. (verified owner)

    Great product and customer service. Will purchase again when needed on future builds. Great quality.

  4. Andrew (verified owner)


  5. Debbie Grissom (verified owner)

    I am very impressed with the build quality of my probe holder. Very happy customer!

  6. Dan (verified owner)

    Much better quality than the Neptune one I bought that he magnet blew out the side a year later.

  7. Brennen (verified owner)

    Great workmanship

  8. David (verified owner)

    Well made product

  9. Bruce Blumberg (verified owner)

    Bought these to replace two Neptune brand racks which had splits in the magnet on the wet side. The Octo strong probe holder stays in place and due to its construction cannot have the same problem. I like them very much

  10. Andrew (verified owner)

    Excellent quality as expected

  11. Keith C. (verified owner)


  12. Adam (verified owner)

  13. Thomas welenc (verified owner)

    Thanks for a great product.

  14. Jessey C. (verified owner)

    Excellent quality ! Smaller than the other magnetic holder I had for Neptune sensors and now I don’t have to worry about the magnet ever contaminating the water like a ticking time bomb .

  15. Anonymous (verified owner)

  16. Mickey S. (verified owner)

    Very well made. Magnets are well encased with no risk of rusting and exposure to water. Highly recommend. Would buy again.

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