Fiberglass drywall tape. It is a mesh very similar to a bug screen, but with larger holes. I had some laying around from when I built an ultralight backpacking cookpot out of a 24oz beer-can. I wasgoing to try a tobacco pipe screen I had for plastic model detail, then I saw the tape. You have to tack it on to the inlet with CA because the adheasive is not that strong, but I pull-tied a section over the end of a PVC pipe and let it set underwater for 22 hours. The integrity of the mesh was just fine. When I am ready to test my pump, I will let it run as long as I can keep feeding it water, and I will post the results of immersion plus flow pressures/vibration.