Morning Jim. I use a diaphram pump to force my bio through a 50 Micron bag filter, than a 25 micron filter, both in filter housings. Once the bio is filtered below 25 microns, I switch over to a system that uses 2 canister 10 micron bag filters. The bio is sent to the first filter, when that plugs a pressure switch sends a signal to switch an electric valve over to a second filter, and lights a red light to let me know to change out the first filter. Then the whole thing starts over again. After I've filtered down below 10 microns, I let it settle overnight, then decant the bio off the top and run it through a 5 micron, then a 1 micron absolute to my storage tank. I've found a continious discharge centrifuge that I want to buy, but the price is still a little high ($2,500) Don.