gzeiger is correct. There's no cyanide in cyanobacteria. Cyano
can come in a rainbow of colors.
Sorry about your loss. Chemical solutions may work great for some, not so great for others. Most red slime removers are oxidizers, and kill the cyano
by rapidly lowering your dissolved oxygen content in the tank. The problem is that everyones water parameters are not identical - what may work fine in one person's tank may crash another's. And even if it's been used in a tank successfully in the past, it doesn't mean it won't crash the tank the next time it's used. It's really a crap shoot...
I know saying this doesn't help you now, but thought maybe it might help others that are in your same position and find this thread in the future.