Funny story. When I worked for Shell Oil in Sarnia Ontario late one night we had a cooling line freeze up. So the other operator and I switched to another line and started steaming the first line. We were out there for hours. Being two rookies we worked and worked on this line. Finally when in for a break mentioned to the older operator about our problem. He said did you check the screen filter? Ahhh no? check it first.

So off we go belly full of coffee to check the screen. This 12" suction line was so packed with Perch we could have filled a freezer.

Long story long here maybe set up a secondary suction line and cleanable filters on each. If there is so much suction no mater what fish you add you will still have this problem. As you start to loose flow with a vac gauge on the right side if screen just switch to the other line clean screen and have the other line ready for the next time.

Cheers Don.

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7/8th of an acre, Perch only pond, Ontario, Canada.