I am incorporating a seagrass tank into this next version of the 270 v3.1 . I want to use turtle grass I think as the primary one. I can dose Iron and I know that makes Macro algeas grow like nuts. Things seem to do better (no matter what type of filtration I have used) when I have some kind of macro filter taking up the slack. I am thinking of the 30 breeder for the seagrass tank.