- Joined
- Feb 24, 2014
- Messages
- 545
- Reaction score
- 450
- Location
- Southern California
- What state or country do you live in
- California
It’s not coralline. It’s diatoms. It’s a sign of tank cycling. It happens at the beginning mostly. You will have it everywhere. It’s not harmful but annoying.also, is yellow algae on the rocks good? Is it a early form of corraline? or will it kill my corraline algae?

