Koralia evo powerheads

[Hp1836]

What would the ideal powerhead setup be for a 90 gallon reef with multiple seahorses be. Tank is 90 gallon 4 feet long. I like the koralia Evo powerheads due to the fact that the slits are to small for a seahorse to get stuck in or grab onto. Right now Ivhave 1 koralia 1150 on one side that is creating a long circular flow but am torn between that and getting a few Nanos instead to create differing flow patterns throughout

 

[Spare time]

Ideally you want enough to prevent crud from building up at a flow dead spot. How you achieve this will probably require you to play around a bit since you know your rockscape better than us