What's on my rocks

[ghaziq]

Any one can tell me what's this white on my rocks? It's a 46gallon tank, 2 month old, only cleaning crew inside. Any advice please

 

[MJSerik]

Sponge or dead coralline algae?

 

[ghaziq]

I don't think it's sponge, it might be coralline algae, so should I do any thing to it or is it good algae

 

[MJSerik]

Coralline is very good.

 

[sanchezkk]

I have the inside of my tank covered with coralline algae. It's a good sign of a healthy tank. That's what I've been told. Correct me someone if I am wrong.

 

[bribo12]

The white is dead coralline. It will come back over time with good water quality.