Help! Black algea

[vince0]

Hi Folks,

I've had my tank running for a few months now, and lately I have had an explosion of black cyanobacteria. No matter how many water changes I do, it doesn't seem to go away. Itll die down for a bit, only to flare back up a few weeks later. Im at the end of my rope with this, and am almost considering shutting the tank down.

Please Help.

Thanks

Vince