I’ve never needed more than 400gph for most of my setups. It really depends on how big your riser is and how high your pump can rise. For my 8 port manifolds 400gph pumps with a ~16 inch rise give a nice even flow.
I’ve never needed more than 400gph for most of my setups. It really depends on how big your riser is and how high your pump can rise. For my 8 port manifolds 400gph pumps with a ~16 inch rise give a nice even flow.