Black substance, algae or bacteria?

[ewasion]

It has been 3 months since I opened the tank. No3 and po4 have always been 0. Green algae appears on the tank wall every 2-3 days. Recently, the rocks are covered with black matter, which is covered with hair. Under white light, I can see that there are hairs, which is very strange. It is difficult to remove and reproduces very quickly. Is there any way to deal with this black substance?

 

[ewasion]

Please see video for details ！

 

[BanZI29]

It looks like some sort of hair algae. to me.
also you No3 and po4 should not be 0. That may be contributing to your algae lssue. Your corals need No3 and po4 to grow. what are you testing with?

 

[Mr. Mojo Rising]

is there any flow in the tank? Nothing is moving, and it looks like stuff is growing on the leather also, and it can't shed.

 

[Dburr1014]

I'm not sure what your seeing?
Can you pull some and spread it out on a paper towel? Take a good close up Pic.

Black could be sponge, cyano, algae...

 

[ewasion]

is there any flow in the tank? Nothing is moving, and it looks like stuff is growing on the leather also, and it can't shed.

There are 2 mp40 responsible for the water flow

 

[ewasion]

I'm not sure what your seeing?
Can you pull some and spread it out on a paper towel? Take a good close up Pic.

Black could be sponge, cyano, algae...

 

[ewasion]

The coral base will also be covered with this, and the reproduction speed is very fast. I took out part of the base and soaked it with reefhd flux for 3 days, but it had no effect.

 

[Dburr1014]

If it's an algae, what I meant is to literally pull algae off and spread it so we can see the structure of the algae threads. Maybe ID it that way.

 

[ewasion]

如果是藻类，我的意思就是将藻类拉下来并将其展开，这样我们就可以看到藻类丝的结构。也许就是这样识别的。

 

[Dburr1014]

I'm thinking it's cyano.
Anyone else?

 

[EeyoreIsMySpiritAnimal]

I'm thinking it's cyano.
Anyone else?

I don't know, but certainly not an emergency...

 

[ewasion]

I'm thinking it's cyano.
Anyone else?

It's not cyano，it's probably another kind of algae. I don't know what creatures can eat it.

 

[ewasion]

I don't know, but certainly not an emergency...

All the stones are covered with this and the coral base is crawled over, I think it needs to be dealt with urgently

 

[Alex2211]

I just get/spotted similar staff in 3 places, all beneath rocks( bottom/out of light) locations. Substance is black (with darkest bluish tint). Its micro hairy, looks like something between hairy mushroom and algae.