Hey everyone, I am almost done setting up my system of a 45G tall tank, with a 29 gallon refugium. For the return and oveflow, I am getting a 500 (or more rated) gph
overflow with a mag 7 pump. I want to make an order today but I wanted to know what powerheads and how many should I put in the main tank? I am mainly growing soft corals, but will have some hard... like a 75% to 25% ratio. The flow from the overflow alone (for the flow in the refugium) should be fast enough because I came to understand that refugiums require a bit slow flow for the macro algaes to filter out the water. Thanks!