Strange Algae

[ron-salt-tank]

Is this funny looking algae in my sump good?

 

[54seaweed]

red slim/hair/cayno

86 it

in other words get it out

 

[Gregcoyote]

Cyanobacteria. Won't hurt anything, but siphon it out. Additional flow will help keep it from forming. It indicates there are some excess nutrients in the water. High selenium from some types of sand can also set it off.