Sdc 3.0 on Reefer 170, how much percentage?

[AirIck]

Dumb question of the day: how do I know what % I need for my return pump to make sure it is 3 to 5 gph? I have a sicce sdc 3.0 on a Red Sea reefer 170. I do not know the height from the return to the overhead box and the diagram on the website is not making any sense to me. Any help would be greatly appreciated!

 

[Ron Reefman]

To know the exact return rate, you need to know the height of the return. Or at least a close approximation.

 

[KStatefan]

The only way to know for sure is to measure it.

You can make some estimates using headloss calculators and pump charts.

 

[GlassMunky]

I just turn the pump on and slowly raise the % its running at until you find the sweet spot.