Hello everyone. I'm pretty new to this hobby and recently I have noticed like Orange/red spots appearing in my live rock. Does anyone know why and if I should be worried?
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Agree that is not what is known in the reefing world as "live rock" What your seeing appears to be Diatoms.
It's about to be 2 months that I've had it set up and running.+1. The diatoms are pretty normal in a new tank. It tends to pop up when a tank is new and they feed off the silicates in the system. It is nothing to worry about.
How old is your tank and can you tell us a little bit about your tank?

