I can't recall if I posted this question before, but anyhow attaching a picture here - Tank is 1.25 years old, and this green appeared 4 months after the tank cycled. Water parameters were and is always good - in terms of Nitrates and Phosphates - never elevated or high, but constant and low to the point that regular algae should not thrive.
This green *can't* be scrubbed off - it's almost like the rock is painted. As the picture shows, some is also on the substrate.
Anyone have any ideas/suggestions what this might be? I was told that this might be coralline, but am not too confident.
Thanks
This green *can't* be scrubbed off - it's almost like the rock is painted. As the picture shows, some is also on the substrate.
Anyone have any ideas/suggestions what this might be? I was told that this might be coralline, but am not too confident.
Thanks