I have recently purchased a GPF-250 uv-c Pond Bio Press Filter and XtremrUS Koi Pressure Pond pump 75144. I do not know what size hose to use
I have a pond with approx. 4,500 gallons of water and the filter will be sitting approx. 13 feet from the pump. Also the filter will be approx. 6-8 feet higher that the pump.
Garden - Water