My tank has a little hair algae in the cristal but I scrapped it. The problem is the Cyanobacteria I deal with it in the past and I can't exterminate it all. I use excel and in the beggining it kill all the algae but 2 month after a cyano bloom appears I use excel again and reduce a lot of it but not exterminate all. Now in my new setup I use a lot of plants of my old aquarium and I think that it have some cyano. And Now the cyano is growing slow but growing!!!. I use excel 2x dose but nothing happen the algae still here. I done 25% w/c and nothing. I use flourish to make the plants grows faster than algae but nothing. I down the 12 hours photoperiod to 10 hours but nothing. What I can do?