i keep seeing excess nutrients are the magical cause of cyano. I am going to challenge that with no data or experiment ... jus a gut feeling out there that the blue green algae that was one of the first multicellular success on Earth maybe that suggests that it is a highly adaptable organism. I am starting to think it is introduced to our system more than magically appearing because of excess nutrients. I have it and started with mostly red now get more green cyano. So tell the truth ... Agree or disagree I just wonder what everyone thinks on it?