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Hey Dave,..best thing to do is filter in the tank. Make a simple PVC filter. Take a piece of PVC and and a hacksaw and cut several slots in the PVC,..get a bottle type brush and clean the inside of the pipe after the cutting,..add an end cap to the PVC,...attach it to the suction hose.

*A cutting wheel can be used but it creates melted PVC "shreds" inside the pipe,..If you do it this way, just use extra care in removing them.

Jeff

Dave - we've used both of the above (both great ideas) but for the last 6 months have not used any filters. So far, no issues.