- Joined
- Jan 3, 2017
- Messages
- 1,264
- Reaction score
- 718
- Location
- Huntington Beach, CA
- What state or country do you live in
- California
My sand bed is not looking good, a lot of brown spots and looking like I'm getting some cyanobacteria in my sand. I didn't even know that was possible. What should i do?

No light no algae, smaller cyano Population.

