cyanobacteria...ugh!

[nick_76]

yup, ive got it, and it appears to be snowballing..its still at the mild wtf is that stage.....but its progressing faster each day

 

[Cory]

Erythromyacin will take care of it.

 

[plaamoo]

Antibiotics do work, at least temporarily, but it's always returned later when I treated it with them. AND, you're exposing your fish to unnecessary, possibly harmful drugs. There are many negative implications related to antibiotic use. Something to consider.
I don't have a solid cure. I have had some success with fluctuating temps and light periods. Try a blackout for a day or two after a good cleaning.

 

[pbmax]

Adding nitrates should do the job. Check out the attached article by Seattle Aquarist. (Thanks to BillHN for sending it to me):

 

[plaamoo]

Nitrates aren't the issue with me. I battle to keep them down. I've also had BGA in high flow tanks.