I'm having an issue dealing with hair algae in a tank and am going to try a two day blackout to get rid of any remnants after a water change and mechanical removal. (Read on the forum about making a tool out of pipe cleaners and it works wonders thanks AA)
I checked water parameters and the nitrates were 5-10 so I will add some up to 20ppm after blackout. The flow output was also a little low on the filter so I increased that as high as it would go after cleaning. I will also reduce the photoperiod from 11 to 9 hours and have removed one of the 3 lights on the tank. The light was burning the glosso carpet.
My question is regarding CO₂. I feel a little silly asking but I am assuming that the solenoid should be unplugged during the blackout as it is controlled by the light timer and not a pH controller.
Please feel free to advise on any other solutions to the issue.