What do you think??

[russell13]

gonna superglue some magnets from a frag tray I have laying around and should work as a probe holder. I thought the one from Apex was a bit pricey

 

[Flippers4pups]

As long as the magnets are strong enough, then should work just fine.

 

[Salty Lemon]

Make sure the magnets are reef safe. Some contain metals that break down and rusts, which leaches into your water.
Edit...oops. I just noticed you said they were from a frag tray. I missed that the first time. Everything should be good. :-)