What would cause the coraline to start turning black ?
Yikes. What did you dose!?Have you dosed anything to kill algae? I accidentally did that and my coralline lost all its color and dinos (which never died) started growing over.
Microbacter Clean. I don’t have definitive proof, but it makes senseYikes. What did you dose!?
I would think the chlorine would kill the fish before the algae.I washed the filter socks with bleach, but I didn't use them for a week
Maybe that was the issue