Hello, i have 125 gallon tank 72x18x24H. My overflow box is a eshopps pf-800, which is rated at 800 gph. My pump is a Rio 3100 powerhead, and at 2' it is rated at 782gph. My sump is 24x12x17H . I only have one 1/2" rubber tube from my pump to the tank.
The problem i'm having is that when i...