Weird red/maroon stuff on rock and magnet cleaner

[mattr567]

My tanks been running for a little over 2 months now and I just starting putting my lights on for about 8-9 hours. This stuff showed up and I’m not exactly sure what it is or what to do with it. I only have 1 fish with 2 inverts, no coral yet. Should it be worried and is there anything I should do or just leave it? Thank you

 

[KrisReef]

If it's only on the magnet I would inspect the magnet, and probably not leave it in the tank submerged.

If it's everywhere, it's just a new reef growing funk for the ugly stages.