Cyano?

[jmatt]

Five months in, battling the uglies. Is this cyano? This is the ugliest stretch of sand, the tank is otherwise not yet being overwhelmed. As you can see I have GHA and some algae (seaweed?) that has fronds.

 

[Lemons]

Five months in, battling the uglies. Is this cyano? This is the ugliest stretch of sand, the tank is otherwise not yet being overwhelmed. As you can see I have GHA and some algae (seaweed?) that has fronds.

View attachment 3178103

Looks like some cyano to me atleast. I would be more worried about the "frond" like algae... is there alot more of it/Growing in patches??