I can’t tell if this is coraline algae or something else, but it looks like it’s going to kill my Zoa. Can anyone help, my zoas just started growing well and I would hate to loose these.
I can’t tell if this is coraline algae or something else, but it looks like it’s going to kill my Zoa. Can anyone help, my zoas just started growing well and I would hate to loose these.
That looks like a film of Cyanobacteria. I would recommend brushing it off the zoas. Normally caused by nutrient imbalance or poor water quality in newer tanks.