Can't get rid of this slime

[AquaAussie]

Any ideas? I can't get rid of this slime. I treated with erythromycin and it came back worse.

 

[Andrew McFadden]

Is it clear and is it a new piece of wood?

 

[AquaAussie]

Years old wood and it's dark green

 

[Andrew McFadden]

Years old wood and it's dark green

I thought it looked green but when you said slime I wasn't sure. Now I'm not sure what it is hmmm...

 

[Fresh2o]

How many days did you treat with EM? I treated for 5 days and there was still some Cyanobacteria present. On days 6-9 it contributed to due off. Prior to treatment I removed as much as possible (via siphon) prior to treatment. I actually had in my tank for several months because I did not know what it was.

 

[AquaAussie]

I think I did 9 or 10 days actually. I'm just worried more medicine can hurt my discus?