I installed a SMR around January/February this year and had heard reports that it may trigger a cyano bloom that would eventually subside. In my case, that worked out to be true. I gave it a little encouragement with a popular product called Chemi-clean. But then it came back a month later. Slowly, but steadily. I treated again and increased the flow in my SMR to make sure I wasn't getting any dead spots in the reactor. I'm currently in process of my fourth treatment this year - and as a guy ...