I used my home made vacuum filter today for the first time. Couple of questions. I wasn't sure how much syrup I had, assumed about 10-11 qt. I added 3 cups of De mixed it and filtered.I used 1 heavy filter and 3 prefilters it seemed to go slow. I didn't remove the vac filters, would that make a difference? Using a 6 hp. vac. Also can I reuse the filter cake or do you replace it each time. Sorry if this has been discussed before.