how do you safely remove BGA (cyanobacteria) in shrimp tank?

I had a massive BGA outbreak in my 125...
It was covering an entire piece of driftwood, several corkscrew vals, as well as alot of the substrate. I tried the water movement thing.. no luck. Tried a blackout, it came back. I could peel it off and the next day it was back.

BGA is a bacteria, and I finally cot rid of it for GOOD with Maracyn.
I followed the ;structions but only dosed 1/2 dose..
within 3 days it was gone, and hasnt come back.

Would have to investigate further to see if it is invert safe.
 
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