Do I need to worry or is this normal?

[Corals & Cabs]

I have this red stuff growing on one of my rocks, only on this one. Is this normal or do I need to get it off?
I have the tank with no fish, I just got hit with Velvet and lost 4 fish, I have the others in my QT tank now going through a Copper treatment. This just happened 4 days ago.

 

[mann1139]

Looks like cyano. If it scrubs off, it is. Little spots happen, just don't let me propagate.

 

[tzabor10]

If it blows off, cyano. If not, might be coralline algae. I have a maroon type.
Keep us posted

 

[Dan_P]

I have this red stuff growing on one of my rocks, only on this one. Is this normal or do I need to get it off?
I have the tank with no fish, I just got hit with Velvet and lost 4 fish, I have the others in my QT tank now going through a Copper treatment. This just happened 4 days ago.

Cyanobacteria is a normal occurrence. Sometimes the film growth explodes. Water chemistry rarely if ever predicts its occurrence. You might not want to neglect this.. Use a turkey baster to suction it off. Dispose of it and replace the water you suctioned out. Return to the place where the cyanobacteria was removed and use the turkey baster to “blow” water over the area. This will remove material that collects on rock surfaces and might be making a home for the Cyanobacteria.

 

[BonnieB]

I also have maroon coralline so I agree with above, first see if it blows off. If so net it out of the tank. Then look to address what’s causing the cyano and make changes (often caused by low/no flow or nutrient imbalance). If it’s the maroon coralline then that’s a pretty one to have.

 

[Corals & Cabs]

If it blows off, cyano. If not, might be coralline algae. I have a maroon type.
Keep us posted

Thank you, I went on YouTube and found a bunch of guidance. Appreciate the guidance.

 

[Corals & Cabs]

Cyanobacteria is a normal occurrence. Sometimes the film growth explodes. Water chemistry rarely if ever predicts its occurrence. You might not want to neglect this.. Use a turkey baster to suction it off. Dispose of it and replace the water you suctioned out. Return to the place where the cyanobacteria was removed and use the turkey baster to “blow” water over the area. This will remove material that collects on rock surfaces and might be making a home for the Cyanobacteria.

Thank you, appreciate the guidance