Hello! New Above ground pool owner here! We purchased a home with a 30’ round above ground pool and it’s been crazy getting this thing cleaned and opened! Now that the water is clear and the holes are patched and the motor is running, we need to replace the cartridge. Calls for a 817-0175N. But I can’t find one. Does anyone know of a different model that will work? We should probably replace the filter with something newer, but I just want to get through our first summer. Have already spent so much $$ getting the pool to this point. Please help! ?