Hi guys, I just filled the tank for the first time and I am having a problem with the sump. The tank is 130g with single overflow in the center. I have a duroso standpipe that extends 6 inches below the water level. I have two pumps a supreme Mag Drive 950g/hr and a 1800g/hr. When I ran the 1800g/hr it ran the sump dry. When it was turned off the sump overflowed from the back siphon. ANy suggestions. Should I used the smaller pump.
Thanks
Thanks