Return Pump?

iridude

New member
I have a 45 gal Red Sea MaxE 170 and a 25 gal sump. I am looking to replace return pump looking at eheim but not sure what size I need. I have about 4ft of head loss. I am guessing need 5x return rate so looking for pump that would do 225 GPH at 4ft hight that correct? I don't see where theres a chart though for this.. thanks
 
I Am guessing this one:

Sicce Syncra Silent 1.5 Multifunction Aquarium Pump (357 GPH) This will be a good return for my tank I am guessing.
 
The manual of Red Sea recommended to use a return pump with at flow of at least 2700 lph so they saying a 3.0 Sicce. My sump is a trigger 20 inch cube. Return Pump Section: 13.25" x 7.625"
 
Red Sea recommends Siccea 3.0 pump. Don't you still think that is too much flow? I also have a MP40 as well
 
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