Flatworms, and how to best treat?

[Reef Rhino]

I have started noticing a few of these on the front glass. White and move quickly over the glass.

Are they a problem and how is it best to treat them?

Thanks

 

[KrisReef]

Those are not the typical flatworms that I have come across.

 

[T-J]

Not flatworms. The first one looks like a nudi.

 

[Reef Rhino]

Thank You for the responses. I will start a new thread: "Nudibranches, and how best to treat?"
I guess that assumes they are bad.

 

[J_Gard88]

How old is your tank?

 

[Reef Rhino]

I started with a 75g reef in 1999 and moved the tank to the new house into a 90g in 2004. It ran for a few years then degenerated with neglect into a cess pool of live rock and algae and a couple clowns. I resurrected it in 2018, pre-covid, and just converted it back into a new rimless 75g this past Spring. So the tank is old in a sense - or at least the live rock.

I have bought corals from 10-12 different local stores and online vendors since 2018 so maybe I picked up the Nudibranch along the way.

 

[cpsrqfl]

I have the same things. A couple of this photos are under a microscope. Do we know what they are yet?

 

[bcardoro]

I have the same things. A couple of this photos are under a microscope. Do we know what they are yet?

Have found one of those in my tank too. Not sure they are flatworms... Did you find a positive ID?

Thanks!